Vocabulary consisting only from characters you are able to read
直火
džikabi
open fire, direct heatmix
開放
kaihou
open, throw open, liberalization, liberalisationsuru
開店
kaiten
opening (of a shop)suru
開閉
kaihei
opening and shuttingsuru
開会
kaikai
opening of a meetingsuru
開通
kaicuu
opening, open, taking effect, becoming activesuru
大作戦
daisakusen
operation, planmix
視点
šiten
opinion, point of view, visual pointmix
反対
hantai
opposition, resistance, antagonism, hostility, contrast, objection, dissension, reverse, opposite, vice versajlpt3, jlpt4, leda1, suru
反抗
hankou
opposition/resistance/insubordination/defiance/hostility/rebellion/(P)leda1, suru
最適
saiteki
optimum, the most suitablemix
順序
džundžo
order, sequence, proceduremix
体制
taisei
order, system, structure, set-up, organization, organisationmix
常微分方程式
džoubibunhouteišiki
ordinary differential equationmath
鉱石
kouseki
ore, mineral, crystalmix
器官
kikan
organ (of body), instrumentmix
構成
kousei
organization, organisation, configuration, compositionsuru
体系化
taikeika
organization, organisation, systematization, systematisationsuru
原点
genten
origin (coordinates), starting pointmix
由来
jurai
origin, source, history, derivation, reason, destinyall
原意
gen'i
original meaningmix
原状
gendžou
original statemix
目新しい
meatarašii
original, novel, newadj
独自
dokudži
original, peculiar, characteristic, proprietarymix
元来
ganrai
originally, primarily, essentially, logically, naturallymix
元祖
ganso
originator, founder, pioneer, inventormix
孤児
kodži
orphan; orphanmix
他
hoka
other (esp. places and things)/the restadj, leda1
外
hoka
other place, the restjlpt5
余人
jodžin
others, other people; others, other peoplemix
場違い
bačigai
out-of-place, inappropriate, sticking out like a sore thumbmix
州外
šuugai
out-of-statemix
宿
jado
outcasts (those from Kamakura period to the Edo period, common around the Kyoto region); inn, lodgingmix
屋外
okugai
outdoors, alfrescomix
外出
gaišucu; sotode
outing, trip, going out; (n,vs) outing, trip, going outsuru
域外
ikigai
outside the areamix
向こう
mukou
over there, opposite direction, across the wayjlpt3, jlpt5
優勝
juušou
overall victory, championshipsuru
飲み過ぎ
nomisugi
overdrinking, excessive drinkingmix
重なり
kasanari
overlapping, piling, stackingmix
持ち主
močinuši
owner, proprietormix
太平洋
taiheijou
Pacific Oceanmix
田んぼ
tanbo
paddy field, farmmix
苦しみ
kurušimi
pain, anguish, distress, suffering, hardshipmix
一対
iccui
pair (of screens or vases, etc.)mix
紙幣
šihei
paper money, notes, billsmix
月極駐車場
cukigimečuušadžou
parking lot rented on a monthly basismix
役割
jakuwari
part, assigning (allotment of) parts, role, dutiesmix
部位
bui
part, position (in a whole, i.e. body)mix
参加者
sankaša
participant, entrantmix
関与
kan'jo
participation, taking part in, participating in, being concerned insuru
別れ
wakare
parting/separation/farewell/(lateral) branch/fork/offshoot/division/section/(P)jlpt3