It's called [Goguma Cafe] and is located in Harajuku.
Luckily, I got there 20 minutes before closing time, so I took some pictures and ate.
The interior is quite simple, and in Japan, many idol [birthday cafes] open at the same time.
Below are the Japanese [special gifts] I received.
[ROHA] cookies, [ILLIT] cookies
It is a perfect example of how to call this the mecca of Japanese music, where everything is available.