According to Japanese Copyright Law (June 1, 2018 grant) the copyright on this image has expired and is as such public domain. According to articles 51, 52, 53 and 57 of the copyright laws of Japan, under the jurisdiction of the Government of Japan works enter the public domain 50 years after the death of the creator.
It is also in the public domain in countries where the copyright term is the author's life plus 50 years or fewer.
And It is also in the public domain in countries where apply the rule of the shorter term
Only countries that are in the public domain
You may download, modify, and use them royalty free for anything you like, even in commercial applications.
Attribution is not required. 
