TAIYO
| Launched | 23 February 1975 | 
| Flight ended | 28 June 1980 | 
| Status | Decayed | 
| Launch site | Uchinoura Space Center (Fomerly Kagoshima Space Center-University of Tokyo, Japan) | 
| Owner | Japan | 
| NORAD ID | 7671 | 
| COSPAR ID | 1975-014A | 
| Alternative names | SRATS | 
| Observing | 
Launched alongside
M-3C R/B