Vocabulary consisting only from characters you are able to read
露天風呂
ろてんぶろ
open air bath/rotemburomix
原っぱ
はらっぱ
open field/empty lot/plain/(P)leda1
直火
じかび
open fire, direct heatmix
開放
かいほう
open, throw open, liberalization, liberalisationsuru
開店
かいてん
opening (of a shop)suru
開閉
かいへい
opening and shuttingsuru
開会
かいかい
opening of a meetingsuru
開通
かいつう
opening, open, taking effect, becoming activesuru
稼動
かどう
operation (of machine)/actual workmix
視点
してん
opinion, point of view, visual pointmix
契機
けいき
opportunity, chancemix
野党
やとう
opposition party, political opposition, oppositionseiji
反対
はんたい
opposition, resistance, antagonism, hostility, contrast, objection, dissension, reverse, opposite, vice versajlpt3, jlpt4, leda1, suru
反抗
はんこう
opposition/resistance/insubordination/defiance/hostility/rebellion/(P)leda1, suru
楽観的
らっかんてき
optimistic, hopefulemo
最適
さいてき
optimum, the most suitablemix
口承文学
こうしょうぶんがく
oral literature, oral traditionmix
順序
じゅんじょ
order, sequence, proceduremix
体制
たいせい
order, system, structure, set-up, organization, organisationmix
常微分方程式
じょうびぶんほうていしき
ordinary differential equationmath
何の変哲もない
なんのへんてつもない
ordinary, plain, commonplaceadj
鉱石
こうせき
ore, mineral, crystalmix
器官
きかん
organ (of body), instrumentmix
団体
だんたい
organization, organisation, associationjlpt3
構成
こうせい
organization, organisation, configuration, compositionsuru
主催
しゅさい
organization, organisation, sponsorshipsuru
体系化
たいけいか
organization, organisation, systematization, systematisationsuru
原点
げんてん
origin (coordinates), starting pointmix
起源
きげん
origin, beginning, risemix
由来
ゆらい
origin, source, history, derivation, reason, destinyall
原意
げんい
original meaningmix
原状
げんじょう
original statemix
目新しい
めあたらしい
original, novel, newadj
独自
どくじ
original, peculiar, characteristic, proprietarymix
元来
がんらい
originally, primarily, essentially, logically, naturallymix
元祖
がんそ
originator, founder, pioneer, inventormix
装飾品
そうしょくひん
ornament, decorationmix
大阪府
おおさかふ
Osaka (metropolitan area)namae
振動
しんどう
oscillation, vibrationsuru
他
ほか
other (esp. places and things)/the restadj, leda1
外
ほか
other place, the restjlpt5
余人
よじん
others, other people; others, other peoplemix
乙姫
おとひめ
Otohime, daughter of Ryuujinkami
場違い
ばちがい
out-of-place, inappropriate, sticking out like a sore thumbmix
宿
やど
outcasts (those from Kamakura period to the Edo period, common around the Kyoto region); inn, lodgingmix
屋外
おくがい
outdoors, alfrescomix
外出
がいしゅつ; そとで
outing, trip, going out; (n,vs) outing, trip, going outsuru
域外
いきがい
outside the areamix
向こう
むこう
over there, opposite direction, across the wayjlpt3, jlpt5
優勝
ゆうしょう
overall victory, championshipsuru
飲み過ぎ
のみすぎ
overdrinking, excessive drinkingmix
重なり
かさなり
overlapping, piling, stackingmix
馬鹿丁寧
ばかていねい
overly polite, excessively polite, polite to a faultmix