Tenbun (天文), also known as Tembun or Temmon, was a Japanese era name (年号,, nengō,; lit. "year name") after Kyōroku and before Kōji. This period started in July 1532 and ended in October 1555. During this time, the emperor was Go-Nara-tennō (後奈良天皇) or Go-Heizei-tennō (後平城天皇).

| Tenbun | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th | 15th | 16th | 17th | 18th | 19th | 20th |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1532 | 1533 | 1534 | 1535 | 1536 | 1537 | 1538 | 1539 | 1540 | 1541 | 1542 | 1543 | 1544 | 1545 | 1546 | 1547 | 1548 | 1549 | 1550 | 1551 |
| Tenbun | 21st | 22nd | 23rd | 24th |
|---|---|---|---|---|
| 1552 | 1553 | 1554 | 1555 |
| Preceded by: Kyōroku |
Era or nengō: Tenbun |
Succeeded by: Kōji |