Teaming with Dennis Ladd in 2000, Kotani published his first instruction book on slack key guitar titled Guitar Playing Hawaiian Style: Kī Hō‘alu, An Instrumental Method For Slack Key Volume One. He followed up in 2007 with an instructional DVD titled Guitar Playing Hawaiian Style with Ozzie Kotani: Kī Hō‘alu Vol.
Kotani's work on slack key guitar instruction began in 2000 with the publication of his first book, followed by a DVD release in 2007.