| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 21 | Kane | Japanese | Putting together; money. Surname. | M | |
| 22 | Kannon | Japanese | Form of Kuan-yin who was Chinese Buddhist deity of mercy. | M | |
| 23 | Kano | Japanese | One's masculine power; capability. | M | |
| 24 | Kaori | Japanese | Add a man's strength. | M | |
| 25 | Keiji | Japanese | Governs with discretion. | M | |
| 26 | Keitaro | Japanese | Blessed. | M | |
| 27 | Ken | Japanese | Strong; physically healthy. | M | |
| 28 | Kenji | Japanese | Intelligent second son; strong and vigorous. | M | |
| 29 | Kenjiro | Japanese | Second son who sees with insight. | M | |
| 30 | Kentaro | Japanese | Sharp; big boy. | M | |
| 31 | Makoto | Japanese | Good. | M | |
| 32 | Manzo | Japanese | Ten thousand-fold-strong third son. | M | |
| 33 | Mareo | Japanese | Rare; uncommon. | M | |
| 34 | Marise | Japanese | Infinite; endless. | M | |
| 35 | Maro | Japanese | Myself. | M | |
| 36 | Michio | Japanese | Man with strength of three thousand. | M | |
| 37 | Miki | Japanese | Tree. | M | |
| 38 | Mikio | Japanese | Three trees together. | M | |
| 39 | Minoru | Japanese | Bear fruit. | M | |
| 40 | Montaro | Japanese | Big boy. | M | |