If you travel to Tokyo and want to eat premium Tsunahachi tempura, I recommend this restaurant. There are several in Tokyo but I usually go in Shinjuku whch is about five minutes from the east exit. There is another on the top floor of the department store Takashimaya Shinjuku (exit South terrace). In case you are not aware exactly what it is, tempura is a Japanese food which originated in Portugal. It was first discovered by Portuguese Jesuits missionaries during the fifteenth century. It was a meal of vegetables and battered fish. Normally, on holidays or in evenings of public holidays, there is a big queue so it's best to go another day.