The word and its root
Mendokusai comes from mendō, trouble or bother, and kusai, a suffix that adds a sense of something being full of a quality. In speech the long vowel usually shortens, so you hear mendokusai far more than the full mendōkusai.
It is an i-adjective, so it conjugates normally: mendokusakatta for the past, mendokusakunai for the negative.
| Japanese | Romaji | Meaning |
|---|---|---|
| 面倒くさい | mendokusai | Troublesome, a hassle |
| 面倒 | mendō | Trouble, bother |
| めんどくさかった。 | Mendokusakatta. | That was such a pain. |
| そんなにめんどくさくないよ。 | Sonna ni mendokusakunai yo. | It's not that much hassle. |
The register ladder
The same idea exists at every level of politeness, and choosing the level is the whole skill. Casual shortenings are for friends; polite forms describe the task rather than your mood.
| Japanese | Romaji | Meaning |
|---|---|---|
| めんどい。 | Mendoi. | Ugh, what a pain. (slang) |
| めんどくせー。 | Mendokusē. | Such a drag. (rough) |
| めんどくさいなあ。 | Mendokusai nā. | What a hassle. |
| それは面倒ですね。 | Sore wa mendō desu ne. | That's a nuisance, isn't it. |
| ご面倒をおかけしてすみません。 | Go-mendō o okake shite sumimasen. | I'm sorry to trouble you. |
| Level | Where it fits | What it conveys |
|---|---|---|
| Slang shortening | Close friends, texting | Ugh, can't be bothered |
| Rough drawn-out form | Very casual, often male-coded | Strong, careless annoyance |
| Standard casual form | Friends and family | What a pain |
| Neutral noun form | Most everyday situations | That's troublesome |
| Polite business phrase | Work, customers | Sorry for the trouble this causes you |
Everyday mendokusai
Among friends, mendokusai is how people grumble about chores, errands and plans that take effort. It often appears with no or koto to turn an action into the thing that is a pain.
Mendokusagari describes a person who habitually cannot be bothered.
| Japanese | Romaji | Meaning |
|---|---|---|
| 料理するの、めんどくさい。 | Ryōri suru no, mendokusai. | Cooking is such a hassle. |
| 雨の日に出かけるのは面倒だね。 | Ame no hi ni dekakeru no wa mendō da ne. | Going out on a rainy day is a pain. |
| 書類を書くのがめんどくさい。 | Shorui o kaku no ga mendokusai. | Filling in forms is tedious. |
| 私、めんどくさがりなんです。 | Watashi, mendokusagari nan desu. | I'm the type who can't be bothered. |
Mendokusai about people
Describing a person as mendokusai means they are difficult, high-maintenance or exhausting to deal with. It is a real criticism and can hurt, especially because it suggests the relationship itself is a burden.
It is worth understanding, because you will hear it in dramas and gossip, but it is not a word to use about people near you.
| Japanese | Romaji | Meaning |
|---|---|---|
| あの人、ちょっとめんどくさいよね。 | Ano hito, chotto mendokusai yo ne. | That person is a bit high-maintenance, right? |
| めんどくさい話になってきた。 | Mendokusai hanashi ni natte kita. | This is turning into a complicated mess. |
Why it sounds bad at work
At work, mendokusai about a task you have been given suggests you do not want to do your job. Even said lightly, it can colour how a manager sees your attitude.
The polite alternative is to describe the task objectively. Tema ga kakaru, it takes effort, and fukuzatsu, complicated, carry the same information without complaining.
| Japanese | Romaji | Meaning |
|---|---|---|
| ちょっと手間がかかりますね。 | Chotto tema ga kakarimasu ne. | It takes a bit of effort, doesn't it. |
| 少し時間がかかりそうです。 | Sukoshi jikan ga kakarisō desu. | It looks like it will take some time. |
| 手続きがちょっと複雑ですね。 | Tetsuzuki ga chotto fukuzatsu desu ne. | The procedure is rather complicated. |
| お手数をおかけします。 | O-tesū o okake shimasu. | Thank you for taking the trouble. |
Mendō o miru: looking after someone
The root word mendō also appears in a warm, practical expression. Mendō o miru means to look after or take care of someone or something, from siblings and pets to a new colleague.
It has nothing to do with complaining, which surprises learners who meet mendokusai first.
| Japanese | Romaji | Meaning |
|---|---|---|
| 弟の面倒を見ています。 | Otōto no mendō o mite imasu. | I'm looking after my little brother. |
| 旅行中、猫の面倒を見てもらえますか。 | Ryokō-chū, neko no mendō o mite moraemasu ka. | Could you look after my cat while I'm travelling? |
| 新人の面倒をよく見てくれます。 | Shinjin no mendō o yoku mite kuremasu. | They take good care of new staff. |