Tojiro Open Factory
This kitchen knife manufacturer is one of the only all-encompassing production facilities in Japan.
Together with traditional techniques for making Japanese knives, they have one of the world's largest share of composite knives made with a combination of different materials that go into "cutting knives" used as weapons.
Over at the knife gallery they have a full lineup on display, including overseas exports that are only available here in Japan. Kitchen knife maintenance is available as well.