If I understand this page (
http://backup.segakore.fr/hitmaker/g...TE/H_FROM.html) correctly, then [H.] was formed on June 15th.
EDIT:
And now I've found [H.]'s end date, March 2015, here on Takenobu Mitsuyoshi's LinkedIn profile:
https://www.linkedin.com/in/takenobu...yoshi-3a85533/