I've added Shikaruna to my Tokyo Toy Shop map, with the store hours, website, etc. I've also added all that info to yesterday's store visit post. Make sure to stop by the shop if you're in Koiwa. Third Uncle is also nearby.
Plus, you can take a very nice walk from Koiwa to Aoto (takes 45 minutes), to visit Shinto Gangu and Real Headz! (But remember to check Mori's Twitter feed to make sure one of the shops is open.)
Also, alas, I've removed Thrashout from the map. One store closes, one store opens.