First Name: Hiroyuki
Last Name: Matsumoto
Birthdate: May 31, 1980
Birthplace: Aichi Prefecture, Japan
Height: 6'0" [184cm]
Blood Type: A
Astrological Sign: Gemini
Hobbies: Cooking, Snowboarding, Walking, Watching Movies, Basketball
PGSM Roles: Nephrite, "Nefukichi", Akai
Official Website: Q&Q Matsumoto Hiroyuki's official Blog

Before PGSM:
He was a model first, and he was in several magazines including Hot Dog, FINEBOYS, CAST-PRIX PREMIUM, Smart and HEAD.

On Pretty Guardian Sailormoon:
His fellow actors said that Hiroyuki was very quiet, then he would suddenly say something hilarious and no one expected it ^[1].

He was my favorite Shittenou to watch; always angry, overreacting even in the later episodes (maybe especially in the later episodes), when his interactions with Motoki were hilarious. The Nephrite/Ami side story was also entertaining to watch.

Projects following PGSM:
He's been pursuing an acting career, mostly. After PGSM, Hiroyuki made several television appearances, including one on Tokusou Sentai Dekaranger and another on Kamen Rider Kabuto.

On stage, he's a member of the acting troupe Orange Prisoners, and has appeared in several theatrical productions, including A Taste of Honey.

He has been in two movies, (minor roles) 2004's Devilman and Ryu Ga Gotoku: Gekijou-Ban.

He has also done a handful of commercials, and appeared in Dandelion's music video "Summer Fireworks"

Resources:

1 - Kirari Super Live Omake #2
Matsumoto Hiroyuki - Wikipedia Japan [Japanese]
Matsumoto - The Fanlisting
TOEI Hero Fanclub page [Japanese]