Chef Marui Yoshio is the head of the Italian Cuisine branch of Ajiou Group.  He is known for his walnut flavored spaghetti sauce.

Ajiyoshi Yoichi is a culinary prodigy who manages the eating house together with his mother. One day, Murata Genjiro appears in the eating house and is surprised at the delicious taste and delicate culinary skills of the katsu-don prepared by Youichi. Subsequently, Youichi is being invited to the Aji-oh Building in which he is involved in a spaghetti match with the in-house Italian chef, Marui. Youichi's novel culinary ideas, coupled with his enthusiasm of serving the best for his guests, allow him to defeat Marui in the match. From then on, Youichi begins to compete with other rivals in the race for the best tastes and dishes. <br><br>
(Source: Anime News Network) 

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Non-anime roles:
~!- Ban Danemon in "Onimusha: Dawn of Dreams" (VG) (Japanese)
- Belial in "Odin Sphere" (VG) (Japanese)
- Brigand in "Odin Sphere" (VG) (Japanese)
- Dagra Dai in "Ninja Gaiden II" (VG) (Japanese)
- Darva in "Cosmic Fantasy 2" (VG) (Japanese)
- Dr. Jumba Jookiba in "Lilo & Stitch" (Japanese)
- Dr. Neo Cortex in "Crash Bandicoot series" (VG) (Japanese)
- Dr.Light in "Rockman 8" (VG) (Japanese)
- Fudô in "Hokuto no Ken: Seikimatsu kyûseishu densetsu" (VG)
- Galdo in "Cosmic Fantasy 3" (VG) (Japanese)
- Gourmand Skeksis (SkekAyuk) in "The Dark Crystal" (live action) (Japanese)
- Heart in "Hokuto no Ken" (VG) (Japanese)
- Lydon Bernhardt in "Tales of Destiny" (VG)
- Nappa in "Dragon Ball Z: Budokai 2" (VG) (Japanese)
- Nappa in "Dragon Ball Z: Budokai 3" (VG) (Japanese)
- Nappa in "Dragon Ball Z: Budokai Tenkaichi 2" (VG) (Japanese)
- Nappa in "Dragon Ball Z: Budokai" (VG) (Japanese)
- Pango in "Klonoa Heroes: Densetsu no Star Medal" (VG)
- Peter Stillman in "Metal Gear Solid 2: Sons of Liberty" (VG) (Japanese)
- Treasurer Skeksis (SkekShod) in "The Dark Crystal" (Japanese)
- Zapf in "Arc the Lad: Twilight of the Spirits" (VG) (Japanese)!~

Ajiyoshi Yoichi is a culinary prodigy who manages the eating house together with his mother. One day, Murata Genjiro appears in the eating house and is surprised at the delicious taste and delicate culinary skills of the katsu-don prepared by Youichi. Subsequently, Youichi is being invited to the Aji-oh Building in which he is involved in a spaghetti match with the in-house Italian chef, Marui. Youichi's novel culinary ideas, coupled with his enthusiasm of serving the best for his guests, allow him to defeat Marui in the match. From then on, Youichi begins to compete with other rivals in the race for the best tastes and dishes. 
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(Source: Anime News Network)