Hiroki Tsubouchi is a photographer for animation, and is the representative director of photography studio Tplus. Previously had worked SynergySP (FKA: Synergy Japan) and later HORNETS' photography departments.

A long time employee for SynergySP's photography department; serving as the photography director for several works of their works including: Cross Game, Cross Fight B-Daman, Cross Fight B-Daman eS, and Hayate the Combat Butler. In December of 2013, he was transferred to HORNETS; following SynergySP transferring its photography division to then newly established HORNETS, represented by former SynergySP producer Hatta Masanobu. In August 2016, HORNETS' photography department was incorporated into a separate company from HORNETS named Tplus, with Tsubouchi serving as the compny's representative director.