[wilgo]

Ramen restaurants in Tokyo are very compact and less tables venues in general except ones in shopping malls food court. In Asakusa area, you may visit Ramen restaurants in Solamachi at Tokyo Skytree.

https://www.tokyo-solamachi.jp/en/restaurant/?m_category=20&page=1

You can also refer to these guides of accessible restaurants in Tokyo;

https://www.accessible-japan.com/wheelchair-accessible-restaurants-japan/

https://www.gotokyo.org/book/actibook/2404_accessible_EN/HTML5/pc.html#/page/1

https://www.mlit.go.jp/kankocho/en/page06_000004.html

(this one may not be the latest…)