Hiking and Rescue Insurance
Mountain rescue in Japan is not free, so if you're ever in need of help it can get expensive fast. Average cost is around 400.000Yen (3000USD)
For residents of Japan I recomend COCO HELI which comes with a rescue beacon. I personally use this insurance and it has a good reputation. The price with 5500Y anually is also quite resonable.
If you sign up through their friendship program and use my code "58064" you can save the enrollment fee (3300Y). You can use google chrome to translate the sign up form.
For international tourists Yamakifu has a short term/per day insurance.
Internationally Global Rescue offers a rescue package, but I have no experience with them so please do some research first.
If you have any questions leave a comment or message me through the chat!