Yes, when I was working on my idea, Physeron caught my attention. So, I contacted them and they gave me a permission to use the information about Physeron on my idea.
Unfortunately, as you can see, the Website of the company is still only in Japanese. Only PDF file is found on the web. http://files.makotoisono-lab.webnode.com/200000143-494da4a417/Physeron%20Concept%20Prese%202.pdf
My recommendation is to use Google Chrome translation function first. https://support.google.com/chrome/answer/173424?co=GENIE.Platform%3DDesktop&hl=en
Then, why don't you send them an Email in English (It is better to include how you found information about Physeron.). I am sure, they will respond to you in English since they always are seeking new market.