What is the climate type in Tokyo, Japan? Is it subtropical monsoon climate or temperate monsoon climate? Why?

Judging from the meteorological records of Tokyo for many years, its city center belongs to subtropical monsoon climate. But now the area of Tokyo is many times larger than in the past, and now the northern part of Greater Tokyo has a temperate monsoon climate. It is just near the dividing line between the two climate types.

It is still generally considered as a subtropical monsoon climate.