Small free museum, definitely check it out. There is only Japanese, so not the best for foreigners. If you're in Tsukiji why not stick your head in?

+1

Interesting small museum about the historic Kachidoki Bridge. Limited English, but interesting nonetheless. You can spend about 15 min here, even if you're a bridge enthusiast.

Unbelievable interesting museum even it’s really small but highly recommended for history lovers.

+3

Interesting little museum. Nothing spectacular but worth to see. Technical museum. Entrance free.

Located roughly halfway between Kachidoki Station and Tsukiji, it has a very romantic look. It's a little intimidating to walk into, but when you open the door, the receptionist greets you with a smile. It's a small exhibition space so it doesn't take long, but it's packed with big machines, so it must be irresistible for people who are into that... The view from Kachidoki Bridge is vastly different now from when it was built, which really makes you feel the passage of time. Admission is free; entry hours change somewhat from December to February.

+3