I think if you look for Kohada prepared traditionally, you have to look for Edo-mae style sushi. Jiro and branches is one of them.
I have heard of some but didn't had a chance to visit them. I think there's one called Kiyomizu or Shimizu (the kanji means clear water) which is in Shinbashi area, quite close to Ginza. However I've been told its still rather pricey.
Tsukiji is good because it has many shops, some cheap, so high end, some middle class - but most are the modern style sushi I believe. Anyway you can see first before you walk in.
By the way, I actually find that Honmaguro Ootoro is very tasty, but it has more sinews in them (especially the belly part. Neck part is okay) compared to cheaper Ootoros from other tunas, which are actually quite good too and even more melt in your mouth. The red meat Akami part however, is much better from proper Hon Maguro fish. Just my long term observation eating way too much sushis.
And here's something strange on Youtube for fun.