Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, chats with customers at his restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, serves sushi to a customer at his restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Eiraku sushi restaurant is seen along Medaka shopping street in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Mitsue Fukutsuna, the wife of sushi chef Masatoshi Fukutsuna, prepares for the opening of their restaurant Eiraku in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, checks the quality of raw tuna at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, is reflected in a mirror at his restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Sushi dish is served to a customer at Eiraku restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, and his wife Mitsue cook sushi dish at their restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Menu card is displayed on the table at Eiraku sushi restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, and his wife Mitsue chat with customers at their restaurant in Tokyo, Japan December 7, 2018. Picture taken December 7, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, rides a motorbike after buying sushi topping at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

A man works between foam boxes at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, walks to buying sushi topping at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, chats with a wholesaler at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, walks to buy sushi topping at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

An wholesaler carts away frozen carcasses of tuna after an auction at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Masatoshi Fukutsuna, chef and owner of sushi restaurant Eiraku, carries sushi topping at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Men drive vehicles known in Japan as "turret trucks" at the wholesalers' area at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

A man works inside a cold storage warehouse at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato

Shoppers and wholesalers walk at Toyosu Fish Market in Tokyo, Japan December 11, 2018. Picture taken December 11, 2018. To match Insight JAPAN-SUSHI/LAST-RESTAURANT. REUTERS/Issei Kato