Key Kobayashi (小林啓, Kobayashi Kei), better known by his pseudonym Kobametal, is a Japanese music producer under the talent agency Amuse, Inc. He is best known as the producer of the kawaii metal group Babymetal.
| Movie | Babymetal: Live at Tokyo Dome: Red Night | 2017 |
| Movie | ライブ 〜レジェンド アイ、ディー、ゼット アポカリプス〜 | 2013 |
| Movie | Live at Wembley: Babymetal World Tour 2016 | 2016 |
| Movie | Trilogy: Metal Resistance Episode III – Apocalypse | 2016 |