One notable audio plugin software company based in Japan is Tokyo Karura Audio. Founded in 2018 by Tatsuya Matsumoto and Fabien Schepfer, Karura Audio is a small but highly respected company that specializes in creating high-quality audio plugins for music production.

The company's philosophy is centered on the idea of "engineering with soul," which emphasizes the importance of both technical precision and creative expression in music production. This approach has led to the development of a wide range of innovative plugins that are highly regarded by music producers and engineers around the world.

Overall, Karura Audio is a shining example of the innovation and creativity that is happening in the world of audio plugin software in Japan. Through their commitment to both technical precision and creative expression, they have earned a reputation as one of the most respected companies in the industry, and their plugins continue to be a popular choice among music producers and engineers around the world.