I was there this spring - they had some modular stuff, and a lot of '80s and '90s MIDI synths. The big keyboards were significantly less expensive than smaller rack stuff. Great deals if you have some way to transport those big boards back home.
There is a Tower Records on the opposite corner of the street, as well as everything else in the Scramble Zones.
Edit: if you want a great view of the Scramble, Shibuya Exel Hotel Tokyu has rooms with this view:
We’re talking gear like the S950 ? I’m out of rack space, but one thing I like about Japanese gear wonders is their mentality is keep upkeep gear for the next generation.
Yes - compact rack stuff was much less expensive than big keyboards. I don’t recall seeing any rare Akais, though perhaps some of the Tokyo-based Elektronauts will chime in.
For vintage toys, check out the shops in this building (and Akiba in general).
For Gunpla / Kits, look for hobby shops. Plenty all over Japan.
I picked up an RG RX-78-2 2.0 at Raku Model in Shinbashi. Nice people, but be aware that they only accepted cash for the Gunpla kit. In retrospect, I wouldn’t seek out the big expensive kits. International prices are actually pretty reasonable. The real values are the cheap stuff - ¥500 kits get marked up to $15+ on eBay, and that stuff is much easier to stuff in your luggage.
I’ve seen joggers all over Japan. Locals will have better ideas.
I’m not familiar with that one, but Akiba is the center for all sorts of toys & fandom. Not necessarily the best prices, but what you want can probably be found there.
Dotonbori is fun - we had lunch at the Kani Doraku with the giant animatronic crab. That’s one video game series that I haven’t gotten into yet, so I’m probably not much help there.
Osaka is a cool place. If you are staying overnight, try to visit the Umeda Sky Building somewhat before sunset. The day, night and sunset views are all worth the price of admission.
If you like amazing views, grab lunch or dinner at the Conrad Osaka. I think you can also just go to the lobby on the 40th floor to enjoy the view without staying at the hotel.
Finally, please consider me a fellow student of Japan and Japanese culture. I’ve visited a few times and know a handful of words and Kanji, but have much to learn from everyone.
Running around the imperial palace over by Tokyo Station is pretty popular, but the neighborhood is maybe not the most exciting. It is conveniently located for going to Akihabara, Ginza, Ochanomizu, and the old historic Tokyo spots, and also for getting Shinkansen to other places in Japan. As a tourist, I guess it’s not a bad option now that I think about it.