Echigoya was certainly a sight for sore eyes, though that might have had something to do with it being raining and late at night. I'd agree gear is pretty damn expensive, but I'd argue most of it is imported, so you have levies and tariffs to deal with.
Accessories like holsters were more reasonable, I got a Level 2 Blackhawk holster for 4800 yen ($50), and the equivalent in Calgary is at least $100 if you want the real deal.
If you get the time, First-JP in the outskirts of Osaka is a good place to spend a few hours. They have a surplus shop, a separate Oakley shop, a main shop with guns, gear, accessories, and around the corner is a Kill-House that allows walk-ons with no gear. Something like 1000 yen for three games, 1500 for five, 2500 for ten (at least, that's what I've been able to glean from their signs and site).
First-JP was a good place for TM parts and guns, quite affordable. Had a big consignment wall too
Next time in Osaka or Kyoto I'll have to make sure I have time to go there for a skirmish or three