Bistro Nippon, Tokyo Sauce Soja

Sano, Shoyu

Ramen Nobu, Special Shoyu Ramen

Mochi Ramen Bar, Tonkotsu Ramen Shio

Iimori Ramen, Tonkotsu Ramen

Tatsu-ya, The OG

Sanju Ramen, Kuro Pork

Ajitama Ramen Bistro, Tonkotsu Hakata

Oreshiki Jun, Butaro

In 2019, I visited Oreshiki Jun in Tokyo Ramen Street. There is a report form tow years earlier: Tokyo Ramen Report: Oreshiki Jun

Tombo Ramen, Shoyu

There is a nice review at Ramen Adventures.