Sakimori:
Welcome — thank you for your post and sharing your experiences of that exhibition. Your English is fine! Replying to your own thread happens all the time, so keep on posting examples in this thread.
The sword you show does not look to be (totally) of Japanese manufacture. The scabbard looks entirely Chinese to me. I would say a Chinese made sword in imitation of a Japanese style. There are others here more knowledgeable about Japanese swords than I am. They will be able to give you a better reading of what this one is.
Ian.