Kappabashi is the place to go for kitchen items if you are in Tokyo. That's where restaurants shop too. It's actually a great place to visit and shop, also for ceramics, knives, etc.
Pineapple is cheap in Japan. Unless it happens to be domestic from Okinawa; I am sure the Okinawan ones probably taste a lot better...... Not a huge fan but I suspect that I paid around 300 yen for Philippine pineapple or wherever it came from. In the US they used to sell them for like $1.99 probably as loss leaders during sales. $4 seems to be a regular retail price.
And Dr. Bernanke told me that there was no inflation while I was away.