Purchasers take part in a auction for buying carcass of beef cattle at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Cattle and breeders take part in a competition at breeding cattle category - young bull division competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Visitors are seen at the main entrance of the 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Cattle and breeders take part in a competition at breeding cattle category - young bull division competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A man checks the pictures of award-winning carcass of beef cattle competitions at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Judges check a cattle in a competition at breeding cattle category at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A staff members are seen at a makeshift cattle shed for Hida Beef at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A male cattle takes part in a competition at breeding cattle category - young bull division competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A cattle and a breeder take part in a competition at breeding cattle category - young bull division competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Breeders, supporters and officials from Kagoshima prefecture celebrate after winning a division of breeding cattle category competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Cattle and breeders from Iwate prefecture pose for a photograph at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A cattle, breeders and officials pose for a photograph during a photo session after winning a breeding cattle category competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A group of female Bungo cattle from Oita prefecture, Fumigiku, Fumiayame, Fumiteru 10 and Fumiroman, are posed for a photograph with their owners including Tadanao Sato during a photo session after captured grand prize of the breeding cattle category at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

Breeding cattle take part in a competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Breeding cattle take part in a competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Breeders and officials from Kagoshima prefecture celebrate after winning a breeding cattle category at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Visitors show off a banner cheering Kobe Beef during a division of breeding cattle category competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Breeding cattle take part in a competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

18 month-old female cattle Yoriko, from Kagoshima prefecture, is posed for a photograph during a photo session after winning the breeding cattle category - young female cattle division competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A female Bungo cattle Fumiayame from Oita prefecture and her owner Tadanao Sato are surrounded by media after captured grand prize of the breeding cattle category at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

Award-winning cattle parade at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

An amulet with a word reading 'victory' is attached a breeding cattle at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

Award-winning cattle parade at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

Award-winning cattle are seen at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

22 month-old male cattle Kinkashou, from Kagoshima prefecture, is posed for a photograph during a photo session after winning the breeding cattle category - young bull division competition at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 10, 2017. Picture taken September 10, 2017. REUTERS/Issei Kato

A visitor poses for a photographer with official cattle mascot Ushi-Masamune at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

A nose ring attached with a female cattle is seen at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

A group of female Bungo cattle from Oita prefecture, Fumiroman, Fumiteru 10, Fumiayame and Fumigiku, are posed for a photograph with their owners including Tadanao Sato (132) during a photo session after captured grand prize of the breeding cattle category at 11th National Japanese Beef Ability Expo, commonly known as Wagyu Olympics, in Sendai, northern Japan September 11, 2017. REUTERS/Issei Kato

Satsumasendai Mayor Hideo Iwakiri talks to Japan's new Economy, Trade and Industry Minister Yoichi Miyazawa (not pictured) during their meeting in Tokyo October 23, 2014. Miyazawa, said on last Tuesday that he would continue with the policy of seeking to restart nuclear reactors deemed safe by the atomic regulator. Miyazawa, speaking to reporters, also said he would move towards restarting Kyushu Electric Power Co's Sendai plant, which is located in the Satsumasendai city, in southwestern Japan. REUTERS/Issei Kato (JAPAN - Tags: BUSINESS DISASTER POLITICS ENERGY)

Satsumasendai Mayor Hideo Iwakiri talks to Japan's new Economy, Trade and Industry Minister Yoichi Miyazawa (not pictured) during their meeting in Tokyo October 23, 2014. Miyazawa, said on last Tuesday that he would continue with the policy of seeking to restart nuclear reactors deemed safe by the atomic regulator. Miyazawa, speaking to reporters, also said he would move towards restarting Kyushu Electric Power Co's Sendai plant, which is located in the Satsumasendai city, in southwestern Japan. REUTERS/Issei Kato (JAPAN - Tags: BUSINESS DISASTER POLITICS ENERGY HEADSHOT)

Japan's new Economy, Trade and Industry Minister Yoichi Miyazawa (R) and Satsumasendai Mayor Hideo Iwakiri bow to each other at the start of their talks in Tokyo October 23, 2014. Miyazawa, said on last Tuesday that he would continue with the policy of seeking to restart nuclear reactors deemed safe by the atomic regulator. Miyazawa, speaking to reporters, also said he would move towards restarting Kyushu Electric Power Co's Sendai plant, which is located in the Satsumasendai city, in southwestern Japan. REUTERS/Issei Kato (JAPAN - Tags: POLITICS BUSINESS DISASTER ENERGY)

Japan's new Economy, Trade and Industry Minister Yoichi Miyazawa talks to Satsumasendai Mayor Hideo Iwakiri (not in picture) during their meeting in Tokyo October 23, 2014. Miyazawa, said on last Tuesday that he would continue with the policy of seeking to restart nuclear reactors deemed safe by the atomic regulator. Miyazawa, speaking to reporters, also said he would move towards restarting Kyushu Electric Power Co's Sendai plant, which is located in the Satsumasendai city, in southwestern Japan. REUTERS/Issei Kato (JAPAN - Tags: BUSINESS DISASTER POLITICS ENERGY HEADSHOT)

Japan's new Economy, Trade and Industry Minister Yoichi Miyazawa (R) reaches out to shake hands with Satsumasendai Mayor Hideo Iwakiri at the start of their talks in Tokyo October 23, 2014. Miyazawa, said on last Tuesday that he would continue with the policy of seeking to restart nuclear reactors deemed safe by the atomic regulator. Miyazawa, speaking to reporters, also said he would move towards restarting Kyushu Electric Power Co's Sendai plant, which is located in the Satsumasendai city, in southwestern Japan. REUTERS/Issei Kato (JAPAN - Tags: BUSINESS DISASTER POLITICS ENERGY)

Japan's new Economy, Trade and Industry Minister Yoichi Miyazawa (R) greets Satsumasendai Mayor Hideo Iwakiri at the start of their talks in Tokyo October 23, 2014. Miyazawa, said on last Tuesday that he would continue with the policy of seeking to restart nuclear reactors deemed safe by the atomic regulator. Miyazawa, speaking to reporters, also said he would move towards restarting Kyushu Electric Power Co's Sendai plant, which is located in the Satsumasendai city, in southwestern Japan. REUTERS/Issei Kato (JAPAN - Tags: BUSINESS DISASTER POLITICS ENERGY)

Hideo Iwakiri, the mayor of Satsumasendai city, listens to a question during an interview with Reuters at the city hall in Satsumasendai, Kagoshima prefecture, April 10, 2014. Satsumasendai never felt the earthquake that triggered the Fukushima nuclear disaster, some 1,600 kilometres to the north in March 2011. But residents saw their friends lose jobs and felt their future was threatened when the Sendai nuclear plant run by Kyushu Electric Power was idled along with the rest of Japan's reactors for a more stringent round of safety checks after Fukushima. Picture taken April 10, 2014. REUTERS/Mari Saito (JAPAN - Tags: DISASTER POLITICS BUSINESS ENERGY HEADSHOT)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, rests on a bench at a park near Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS TPX IMAGES OF THE DAY)

Homeless men snuggle in sleeping bags inside an abeyant fountain equipment and on bench seats at an underground passage near Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS TPX IMAGES OF THE DAY)

A homeless man snuggles in a sleeping bag on a bench at an underground passage near Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama (R), a 57-year-old homeless man from Hokkaido, and an another homeless man sleep on the ground as a passerby walks past at a concourse of Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

A homeless man rests on the ground at a concourse of Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Seiji Sasa, a 67-year-old former professional wrestling promoter, speaks during an interview with Reuters at his home in Sendai, northern Japan December 18, 2013.Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Seiji Sasa, a 67-year-old former professional wrestling promoter, speaks during an interview with Reuters at his home in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Seiji Sasa, a 67-year-old former professional wrestling promoter, speaks during an interview with Reuters at his home in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, walks at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, clears his belongings away in front of a clothes shop at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama (R), a 57-year-old homeless man from Hokkaido, and an another homeless man sleep on the ground as a passerby walks past at a concourse of Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

A homeless man sits on a bench seat at an underground mall at Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

The signboard of Sendai Station is seen under the moonlight in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

People walk on an overhead bridge near Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama (C), a 57-year-old homeless man from Hokkaido, walks at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, speaks during an interview with Reuters at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, speaks during an interview with Reuters at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, shows a notebook for radioactive exposure management for workers involved in the clean up of areas affected by the Fukushima nuclear disaster at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, shows a notebook for radioactive exposure management for workers involved in the clean up of areas affected by the Fukushima nuclear disaster at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama (C), a 57-year-old homeless man from Hokkaido, poses for a photo in front of an automatic ticket barrier at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, takes an escalator at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Plastic bags containing belongings of homeless men are placed on a signpost at an underground passage near Sendai Station in Sendai, northern Japan December 17, 2013. Picture taken December 17, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Shizuya Nishiyama, a 57-year-old homeless man from Hokkaido, speaks during an interview with Reuters at Sendai Station in Sendai, northern Japan December 18, 2013. Picture taken December 18, 2013. To match Special Report FUKUSHIMA-WORKERS/ REUTERS/Issei Kato (JAPAN - Tags: CRIME LAW DISASTER BUSINESS EMPLOYMENT CONSTRUCTION POLITICS)

Japan's Prime Minister Yoshihiko Noda, who is also the leader of the ruling Democratic Party of Japan (DPJ), delivers a speech to voters atop of a campaign van in Sendai, northern Japan December 4, 2012. Candidates hit the streets on Tuesday at the official start of a campaign for a parliamentary election that is expected to return the opposition Liberal Democrats to power but risks furthering the policy stalemate plaguing the world's third-biggest economy. REUTERS/Issei Kato (JAPAN - Tags: POLITICS ELECTIONS HEADSHOT)

Rain drops fall in front of the face of Japan's Prime Minister Yoshihiko Noda, who is also leader of the ruling Democratic Party of Japan (DPJ), as he delivers a speech to voters from atop a campaign van in Sendai, northern Japan December 4, 2012. Candidates hit the streets on Tuesday at the official start of a campaign for a parliamentary election that is expected to return the opposition Liberal Democrats to power but risks furthering the policy stalemate plaguing the world's third-biggest economy. REUTERS/Issei Kato (JAPAN - Tags: POLITICS ELECTIONS)