Soft Scrub with Bleach works well. Clean the sink with dish soap the best you can. Once it is clean, apply Soft Scrub with Bleach with a sponge and allow it to whiten for a couple of minutes before rinsing it off. I do this about once a month or whenever it starts to look scummy again.












Hahaha. A friend told me about Kappa at a party a while back. Have you seen how to properly trap a Kappa? You dangle your ass over the water to lure one in and then your buddies spear it.
https://www.tofugu.com/japan/kappa/
Another creature from Japanese lore is the Tanuki. They are shape shifting raccoon/dogs that have magical expanding scrotums. Here is a scene from Pom Poko.
https://www.dailymotion.com/video/xlft8n