Where to buy shinobues in Japan

Q & A: I'm going to Japan. Where can I go to buy shinobues?
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Answer: I recommend checking out Mejiro. https://www.mejiro-japan.com/en/contact-us​

(Also, I hear they have great customer service for online customers.)

I also recommend the Miyamoto Unosuke shop. Here is a video I created when I visited them in 2023.