The word you're referring to is likely “tokusatsu,” which is a Japanese term used to describe a genre of live-action film and television that includes special effects and often features superheroes, giant monsters, and mechs. However, in the context of characters launching off in mechs, it could be that you misheard "takk," which is a form of "takka," sometimes used in anime when characters are initiating or launching something.
In many mecha anime, characters use phrases like "launch" or specific commands in Japanese, such as "Hasshin" (発進), which means "launch" or "takeoff." If you can give me more details about the specific anime or the context, I might be able to help you identify it more accurately!