| 18 October 2008 | Oldest debut as a feature film director | | Takeo Kimura |
| October 2008 | First arrest for murder of a virtual victim | | Unknown |
| 01 August 2008 | Longest audio book | 6943 hour(s):minute(s):second(s) | Takaaki Yoshimoto |
| 18 July 2008 | Greatest advance sales for an animated film | | Pikachu Project |
| 04 July 2008 | Longest career as a magazine cover illustrator for the same magazine | | Keizo Tsukamoto |
| 14 June 2008 | Largest Peak Ground Acceleration measured in an earthquake | | NIED National Research Institute for Earth Science and Disaster Prevention |
| 21 May 2008 | Longest serving daily newspaper columnist | 32/220 year(s):day(s) | Hiroyuki Itsuki |
| 20 April 2008 | First win (female), IndyCar | 2008/4/20 first | Danica Patrick |
| 13 April 2008 | Largest Taishogoto | | Kindenryu Taisho-koto |
| 13 April 2008 | Largest taishogoto ensemble | | Kindenryu Taisho-koto |
| 12 April 2008 | Most visited personal blog in 24 hours | 230755 people | Yusuke Kamiji |
| 31 March 2008 | Most hours of live television by a host in one week | | Monta Mino |
| 12 March 2008 | Best selling album act in Japan | | B'z |
| 2008 | First use of Nintendo for criminal investigation | first | Unknown |
| 2008 | Smallest high-definition camcorder | | Toshiba IK-HD1 camcorder |