Hayashida began programming in fifth grade on the
Commodore VIC-20. He began programming at
Nintendo while the company was developing for the
NES. He notably programmed for
Super Mario Sunshine (2002). He was an assistant director on
Donkey Kong: Jungle Beat (2004), and the level design director for
Super Mario Galaxy (2007). Hayashida was the director of
Super Mario Galaxy 2 (2010). Hayashida and
Shigeru Miyamoto developed a four-step process for the game's levels to teach a new
game mechanic, titled
kishōtenketsu, which derives from Chinese and Japanese poetry and
manga writing. In the game version of
kishōtenketsu, a game mechanic is introduced in a
level, evolves to let players grow their skills, given a twist that makes the players think of the concept in a different way, and then concluded with a test that makes players use every concept they learned throughout the level. The technique has been used by Nintendo for numerous games since then. Hayashida was then the director of
Super Mario 3D Land (2011). To help his development team, he gave them "Miyamoto's Teachings": a book of quotations by Miyamoto, a more experienced designer who had begun to lessen his role at Nintendo. To make the game more approachable for less experienced players, Hayashida decided the game would technically end at its halfway point, when the story was over and the credits rolled, but there was a whole other half of more challenging levels. The game's development was delayed because of the
2011 Tōhoku earthquake and tsunami. To motivate the game's developers, who were previously separated by their different trades, Hayashida moved everyone into a common area to work more collaboratively. Hayashida was a co-director for
Super Mario 3D World (2013), directing alongside Kenta Motokura. He was the director of
NES Remix (2013) and
NES Remix 2 (2014). These games were first made for
Wii U instead of the
3DS, partially because Hayashida was more familiar with the Wii U's architecture. He was the producer of
Captain Toad: Treasure Tracker (2014) and
Super Mario Odyssey (2017). He worked on the design of
Super Mario Bros. Wonder (2023). ==Works==