Cards by Kouichi Ooyama: TCG Illustrator Guide
Browse Pokémon TCG cards illustrated by Kouichi Ooyama — chase prints, signature species, and pricing notes for collectors.
2025-11-17
About Kouichi Ooyama
Bulbapedia bio for Kouichi Ooyama (大山 功一) — translated into a quick collector primer.
Kouichi Ooyama (Japanese: 大山 功一 Ōyama Kōichi), born 1960, is one of the original game designers of the Pokémon Trading Card Game, and later Pokémon Duel. He was also the illustrator for What's Nassy's Favorite Word? and worked on EarthBound as an art director, graphic designer, and game designer.
He made a cameo in the Pokémon Trading Card Game video game as a Pokémon Card researcher, Dr. Ooyama (Dr. Mason in the English version of the game). Dr. Ooyama looks like Ooyama, but with gray hair, a lab coat, and a Pokémon Card attached to his head. Kouichi Ooyama has appeared at the Tropical Mega Battle in costume as Dr. Ooyama.
Kouichi Ooyama's TCG footprint
How much of the catalogue this artist has shaped.
- Credits: 37 cards across the TCG
- First set: BREAKpoint
- Most recent set: Pokémon Trading Card Game Classic
- Illustrates 23 different Pokémon species
Pokémon TCG cards
35 Pokémon TCG cards illustrated by Kouichi Ooyama, newest first.
Wisdom of Sea and Sky
One Diamond
Black Bolt
Rare
Black Bolt
Common
Celestial Guardians
Three Diamond
Celestial Guardians
One Diamond
Space-Time Smackdown
One Diamond
Promos-A
One Diamond
Promos-A
None
Genetic Apex
Three Diamond
Genetic Apex
One Diamond
151
Rare
McDonald's Collection 2021
None
Showing 12 of 35 loaded cards · card data from TCGdex with pokemontcg.io as backup · images via Scrydex when needed
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