Wow, that salmon looks really good, and has a nice amount of fat. I haven't tried Gekkeikan sake, but I would recommend trying Sho Chiku Bai. They have a lot of traditional sake, but they also have really good flavored ones for easy and light drinking. They also have virtual sake tasting if you want to try it out. If you're close to Berkeley, CA, I think they opened live tasting as well.
Very cool, I will check it out 😎