Yikes! I’d completely forgotten about that... Obviously I’m not telling you something you don’t already know!

How about Sengaku-Ji — have you been there? It probably doesn’t get much publicity (at least compared with Meiji-jingu and Senso-ji) which is surprising, given its role in Japanese history. Perhaps it’s not ‘touristy’ enough. We enjoyed our visit and thought it well worthwhile in understanding this piece of Japanese history.

https://www.japan-guide.com/e/e3000.html

https://en.m.wikipedia.org/wiki/Forty-seven_rōnin