航海|こうかいkoukai[1]atamadaka (head-high)
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- noun, suru verb, intransitive verb(sea) voyage; navigation; sailing; passage; cruise
Conjugation
| Dictionary form | 航海する(こうかいする) |
|---|---|
| Polite (masu) | 航海します(こうかいします) |
| Negative (nai) | 航海しない(こうかいしない) |
| polite (masen) | 航海しません(こうかいしません) |
| classical zu / nu | 航海せず・航海せぬ(こうかいせず・こうかいせぬ) |
| Past (ta) | 航海した(こうかいした) |
| polite (mashita) | 航海しました(こうかいしました) |
| Past negative (nakatta) | 航海しなかった(こうかいしなかった) |
| polite (masen deshita) | 航海しませんでした(こうかいしませんでした) |
| Te form | 航海して(こうかいして) |
| Potential | 航海できる(こうかいできる) |
| Passive | 航海される(こうかいされる) |
| Causative | 航海させる(こうかいさせる) |
| Causative passive | 航海させられる(こうかいさせられる) |
| Conditional (ba) | 航海すれば(こうかいすれば) |
| tara | 航海したら(こうかいしたら) |
| Volitional | 航海しよう(こうかいしよう) |
| polite (mashou) | 航海しましょう(こうかいしましょう) |
| Imperative | 航海しろ(こうかいしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym航行こうこうNeutralNeutral term for a ship or aircraft proceeding along its course, as in 「航行中」; it stresses the act of moving, while 「航海」 is specifically travel at sea.
- Synonym船旅ふなたびNeutralA trip taken by boat, as in 「のんびり船旅」; the emphasis is on the journey as travel rather than on the sailing itself.
- Synonym渡航とこうWrittenIn written/formal prose, crossing to another place by ship or plane, as in 「渡航手続き」; typically for going abroad.
- SynonymクルーズCasualColloquial loanword for a sightseeing cruise on a passenger ship, as in 「クルーズ船」.
- Synonym通航つうこうWrittenWritten/formal prose for ships passing through, as in 「通航禁止」; used mostly of straits and canals.
- Related巡航じゅんこうWrittenWritten/formal prose for cruising, as in 「巡航速度」; used mostly of warships and aircraft.
- Related帆走はんそうWrittenWritten/formal prose for sailing driven by the wind; used mostly of sailing boats.
- Related航走こうそうWrittenWritten/formal prose for a ship sailing through the water; rare.
- Related航するこうするWrittenWritten/formal prose verb for sailing or voyaging; rare — in everyday speech say 「航海する」 or 「航行する」.
Use 「航海」 for a long sea voyage by ship, as in 「大航海時代」 or 「航海日誌」. For moving along a course say 「航行」, for crossing to another place 「渡航」, for a sightseeing cruise 「クルーズ」, and for a trip by boat 「船旅」. 「巡航」 is written prose for cruising, mainly warships and aircraft; 「航走」「帆走」「航する」 are rare written words for sailing, and 「通航」 for ships passing through straits or canals.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


