- damasareyasui hito (騙され易い人): a simple person, a credulous person
- damashite mono o toru (騙して物をとる): to cheat a person out of, to deceive a person out of
- dame (駄目): to be useless, to be (of) no use, to be no good, won't do; to be hopeless; to be a failure, it's all over/up with (me)
- dame o osu (駄目を押す): to make doubly sure
- dameni naru (駄目になる): to be spoilt/ruined, to fail, to go wrong, [計画が] to be upset
- dameni suru (駄目にする): to spoil, to ruin, to waste
- dameoshiten (駄目押し点): an insurance run
- damigoe (濁声): a thick voice
- damin o musaboru (惰眠を貪る): to idle away one's time
- damī (ダミー): a dummy
- damīgaisha (ダミー会社): a dummy company
- dan (団): a group, a team, a party, a troupe
- dan (壇): a platform, a rostrum, a pulpit
- dan (段): steps, a flight of stairs; a column; a grade, a rank, a class
- dan o kudasu (断を下す): to decide, to make a (final) decision
- dan o toru (暖をとる): to warm oneself
- dan'atsu (弾圧): suppression
- dan'atsu suru (弾圧する): to suppress, to bring pressure
- dan'atsuteki (弾圧的): oppressive
- dan'in (団員): a member [of a party]
- danbō (暖房): heating
- danbō ga kiiteinai (暖房がきいていない): to be not warm enough
- danbō ga kiiteiru (暖房がきいている): to be comfortably heated
- danbōkanbi (暖房完備): air-conditioned
- danbōru (段ボール): corrugated paper, corrugated cardboard
- danbōrubako (段ボール箱): a cardboard box
- danbōsōchi (暖房装置): a heater
- danchi (団地): a housing development, a housing complex; a housing project, a housing estate
- danchigai de aru (段違いである): to be not in a class with, to be no match for
- danchigaiheikōbō (段違い平行棒): uneven parallel bars
- danchisaizu no (団地サイズの): apartment-sized ~
- danchizoku (団地族): dwellers in housing developments, estate-dwellers
- danchō (団長): the leader, the head
- danchō no omoi ga suru (断腸の思いがする): to feel as if one's heart would break
- dandan (段々): gradually, step by step, by degrees; [階段の] steps; stairs
- dandanbatake (段々畑): terraced fields
- dandori (段取り): a plan, a program, arrangements
- dandori o kimeru (段取りを決める): to arrange for, to make arrangements for
- dandō (弾道): a trajectory, a line of fire
- dandōmisairu (弾道ミサイル): a ballistic missile
- dangai suru (弾劾する): to impeach, to denounce, to accuse
- dangaisaibansho (弾劾裁判所): a Court of Impeachment
- dangaizeppeki (断崖絶壁): a cliff, a precipice
- dangan (弾丸): a bullet, a shell
- dangen (断言): an assertion
- dangen suru (断言する): to assert, to affirm, to declare
- dango (団子): a dumpling
- dangobana (団子鼻): a snub nose
- dangō (談合): consultation, conference; collusion, bid-rigging
- dani (壁蝨): a (dog) tick; [Infml.] a hoodlum, street vermin
- danji (男児): a boy
- danjiki (断食): a fast, fasting
- danjiki suru (断食する): to fast
- danjikiryōhō (断食療法): a fast cure
- danjite (断じて): absolutely, decidedly, upon one's honour; never, by no means
- danjo (男女): man and woman, both sexes
- danjo kakusa (男女格差): [賃金の] a wage differential between men and women
- danjo o towazu (男女を問わず): regardless of sex
- danjobyōdō (男女平等): equality between men and women
- danjodōken (男女同権): equal rights for both sexes
- danjokoyōkikaikintōhō (男女雇用機会均等法): the Equal Employment Opportunity Law
- danjokyōgaku (男女共学): coeducation
- danjosabetsu (男女差別): sex discrimination, gender discrimination
- danka (檀家): a parishioner
- dankai ni hairu (段階に入る): to reach a stage; to enter/assume a phase
- dankai no sedai (団塊の世代): the baby-boom generation
- dankaijunia (団塊ジュニア): a junior baby-boomer
- dankaitekikanzeihikisage (段階的関税引き下げ): phased reduction of tariffs
- dankaitekina (段階的な): phased
- dankaitekini kakudai suru (段階的に拡大する): to escalate
- dankaitekini shukushō suru (段階的に縮小する): to de-escalate
- dankaitekishukushō (段階的縮小): de-escalation
- dankeisōzoku (男系相続): succession in the male line
- danketsu (団結): union, cooperation
- danketsu shite (団結して): in union, in a body
- danketsu suru (団結する): to unite, to get together
- danketsuken (団結権): the right to organize, the right of organization
- danketsushin (団結心): co-operative spirit
- gendankai ni oite (現段階において): at this stage
- reidanbōkanbi (冷暖房完備): air-conditioned
- shinakereba dame da (しなければ駄目だ): must do, should do
- shitewa dame da (しては駄目だ): must not do, should not do