| 1K | mashuu (neko no oyashiro) | |
| 957 | minato ojitan | |
| 946 | yume no owari | |
| 644 | arano oki | |
| 481 | shiwasu no okina | |
| 453 | hoshino ouka | |
| 380 | ao oni (onioni-aoi) | |
| 311 | sakurato ototo shizuku | |
| 287 | souta (karasu no ouchi) | |
| 239 | kuro oolong | |
| 215 | mitsumine (ookami no oyashiro) | |
| 198 | homare (suzu no oka) | |
| 191 | kuso otoko | |
| 179 | kaho okashii | |
| 172 | fukuro ooji | |
| 172 | rimu (kingyo origin) | |
| 171 | cafe (chuu no ouchi) | |
| 168 | gomashiwo o | |
| 148 | aiwo o lite | |
| 132 | kokouno oyazi | |
| 128 | ko-on (ningen zoo) | |
| 119 | aoiro oto | |
| 112 | io (io oekaki) | |
| 110 | matsuno opa | |
| 110 | shino-o | |
| 108 | makoto ono | |
| 107 | sukuyo onaka | |
| 104 | cobra no oyatsu | |
| 102 | ai (u e o o) | |
| 97 | others (gogo-o) | |
| 88 | takeno omoti | |
| 87 | tori no ou | |
| 71 | h2o omizu | |
| 71 | sho (sho oe4) | |
| 70 | kakuchou no ou | |
| 69 | oli o o | |
| 68 | yoneko okome | |
| 66 | akino ochiba | |
| 66 | ringo orihara | |
| 65 | goro orb | |
| 65 | sato one1 | |
| 62 | momoiro oji | |
| 59 | nico o0 | |
| 58 | ichiko oharu | |
| 58 | macho ojiji | |
| 57 | tororo oishi ym | |
| 55 | shosho oekaki | |
| 55 | totoro on | |
| 53 | miyako omty | |
| 53 | shiro oolong-cha | |