The Japanese Journal of Applied Physics (JJAP) is a peer-reviewed scientific journal that was established in 1962 and is published by the Japan Society of Applied Physics. From 1982 until 2008, the journal was published in two editions, Part 1 and Part 2:Part 1 was published monthly and was for regular papers, short notes and review papers. Part 2 was published semi-monthly and was for letters and express letters.