M-V R/B(1)
| Launched | 2 July 1998 |
| Flight ended | 7 July 1998 |
| Status | Decayed |
| Launch site | Uchinoura Space Center (Fomerly Kagoshima Space Center-University of Tokyo, Japan) |
| Owner | Japan |
| NORAD ID | 25384 |
| COSPAR ID | 1998-041B |
| Observing |
Timeline
| 1998 Jul 4 | – | Launch from Uchinoura Space Center |
| 1998 Sep 24 | – | Flyby of the Moon |
| 1998 Dec 18 | – | Flyby of the Moon |
| 1998 Dec 20 | – | Flyby of the Earth |
| 1999 Oct 11 | – | Scheduled arrival date at Mars (failed due to incorrect trajectory) |
| 2002 Apr 21 | – | Flyby of the Earth |
| 2003 Jun 19 | – | Flyby of the Earth |
| 2003 Dec 9 | – | Failed preparations for Mars orbital insertion |
| 2003 Dec 14 | – | Flyby of Mars |
| 2003 Dec 31 | – | Spacecraft decommissioned |