The previous comment sums up pretty much everything.
Compare to other Japanese courses, the holes are not too short.
The course requires a variety of shots

-Need a registration at the office
-Some tees are hard to locate since it is away from the tee sign
-Occasionally, overcrowded with (sometimes unwelcoming) local elderlies. Go check the course review on PDGA website as well.

Great course design but the local community, mostly consists of elderlies, is unwelcoming and does not have a good attitude towards outsiders and non-club members. Thus, I had to give a low rating.

The last time I came here, it was overcrowded with the locals. Most of the locals play with their original alternative course design which makes almost all the fairways overlap with other fairways, tees, and baskets of the regular course. While I was playing with regular course design, some local guys, who were playing with alternative design, started to shout at me to "watch out for the disc and move away". Some people don't really care if I was still on the fairway and started to throw the discs at me. Also, their alternative course design does not consider the flow of people and the safety and with many people playing in that format made the course chaotic.
What was worst, one elderly club member asked me if I am in disc golf insurance, which I was not and didn't even know such an existence, and I answered no. The guy responded in an extremely aggressive manner by screaming "If I got injured, I will accuse you and make you pay for everything." It was disappointing to encounter such a rude person in the disc golf world.
So the conclusion is that the course itself is great, but some local elderly are not welcoming and do not have a sense of respect for outsiders (btw, I'm Japanese).

Tips: If I go next time, I will check if it is reserved by a group/club or not. You would not like to play with numbers of "unwelcoming" local members