Originally Posted by
Tourist in MSN
....I had a bottom bracket sleeve on the non-drive side that needed to be tightened to stop clicking. I did not figure it out until I bought a new bottom bracket and when I started to remove the old one, it felt looser than it should have been. So, instead of replacing it, tightened it. Worked great. Now I have a spare on the shelf.....
Also note that some bottom bracket cups are plastic. They can crack and cause a clicking sound.
As you're in Japanland, you should be able to pick up VP branded bottom brackets that have aluminum cups.
I'm pretty sure those cups also fit shimano BB's, so your bike shop or online seller should have replacement cups.
You'll have to remove the BB to inspect and will need to take measurements if replacing. Plenty of youtube videos explain the process.
https://www.amazon.co.jp/-/en/VP-Bot.../dp/B00FOHDKX8
bottom bracket is about 8 bucks japanazon, assuming your 10-yo bike has a square taper.