Guzzi, I am not sure if that is a complete list or not but I doubt it, the big guys probably do stick to a handful of varieties only though for economic reasons. I just pulled it out of one of the files that I shared, someone else had passed that file on to me a while back.
Fendcar I think Japan has several climate/growing zones although they only really identify 3 of these on the back of seed packets. If you grab a pack of tomato seeds for example they have a 3 color map on the back that lists the miura peninsula in the same region as okinawa? Thats got to be BS.
I personally think that heat stress is the biggest danger, followed by humidity related disease, then pests.
If you are not sure about the heat stress around your place, planting in a large container is useful. If one location is too hot you can move the container to a shadier spot. My planters are black so they stay in the shade all the time, and have not had much problems. I started to move my Magnum this fall and found a taproot as thick as my thumb had gone down through the base into the soil, so careful if you need to move - it might mean breaking roots and shocking the plant in another way
I got signs of powdery mildew, which was running rampant through my bottle gourds this past summer. I learned about spraying a dilute milk solution on to control it at that time. A bad smelling but effective treatment! The PM had very little effect on the plants, as I was already spraying the other crops and watching for it. PM is not fatal so I wouldn't spray bines that are full of cones, I wouldn't want milk residue on my hops!
Lastly, I got spider mites on 2 plants. Both suffered several dry leaves and dropped them, and I used pesticide on them. I would have used a more natural remedy but couldn't afford the time and risk of spreading out of control to all my other plants. Mites can be tolerated in low levels but you want to control their numbers to avoid decreased yield. Soapy water, or garlic water is useful. The spray I got was very effective, you can go to a garden center and they have a pest-guide beside the control methods, so even without good Japanese you can find a picture of the mushi/disease and the corresponding product sold for it.
A word of personal opinion though not only relevant to hops - Japan is one of (last time I looked, #1) the highest pesticide using countries on earth and it isn't good to keep that going. A lot of the most popular products are the systemic variety that are sprinkled around the roots in pellet form - spreading throughout the whole plant to kill anything that feeds on them. These are neoniconide chemicals and very very bad for pollinators as well as pests. Use them only if it is
before the plant flowers, after that you are likely killing off the good-guys too.