How to differentiate friend levels in Japanese?


I sometimes have difficulty differentiating friend levels when explaining
something to a Japanese person. For example, when I am telling a story about a
friend, I want to specify the level of friendship we have based on the context
of the story.

So there are 4 commonly known levels of friendship (click
[here](http://ati.iblp.org/ati/supportlink/kb/questions/60/) for those who are
not familiar):

  1. Acquaintance
  2. Casual friend
  3. Close friend
  4. Intimate friend

Others:

  5. Best friend (a little bit different from intimate friend)

There are several terms I do hear when Japanese refer to friends like 友達, 友人,
親友, and 仲間{なかま} (translates as 'comrade' but commonly used to mean 'friend' in
anime). How do I differentiate them in Japanese? Or do Japanese not
differentiate between them?




When it comes to personal/social relations, Japanese is more delicate than
most other languages in the world. English is on the other extreme. It does
not even have a simplex word to distinguish "younger brother" and "older
brother" or "younger sister" and "older sister", and people call even teachers
by their first name without polite prefix in English, and shop clerks say "hey
guys" even to the customer.--Pretty much unbelievable to a Japanese learning
English for the first time.

Following are roughly listed from less intimate to more intimate.

  * 知人, 知り合い 'acquaintance'
  * 同窓生 'schoolmates', 'people who graduated the same school (often in the same fiscal year)'
  * 同期 'people who entered the same school/company/institution etc. in the same fiscal year'
  * 同級生 'classmates'
  * 同僚 'colleague'
  * 友達 'friend'
  * ダチ slangish way of saying 'friend'
  * 友人 formal way of saying 'friend'
  * 仲間 'buddy'
  * 旧知 'long acquaintance'
  * 親友 'close friend'
  * マブダチ slangish way of saying 'close friend'
  * 連れ 'partner'
  * 相棒 'partner (of a duo)'
  * 友達以上恋人未満 'friend or more but less than a lover'




When it comes to personal/social relations, Japanese is more delicate than
most other languages in the world. English is on the other extreme. It does
not even have a simplex word to distinguish "younger brother" and "older
brother" or "younger sister" and "older sister", and people call even teachers
by their first name without polite prefix in English, and shop clerks say "hey
guys" even to the customer.--Pretty much unbelievable to a Japanese learning
English for the first time.

Following are roughly listed from less intimate to more intimate.

  * 知人, 知り合い 'acquaintance'
  * 同窓生 'schoolmates', 'people who graduated the same school (often in the same fiscal year)'
  * 同期 'people who entered the same school/company/institution etc. in the same fiscal year'
  * 同級生 'classmates'
  * 同僚 'colleague'
  * 友達 'friend'
  * ダチ slangish way of saying 'friend'
  * 友人 formal way of saying 'friend'
  * 仲間 'buddy'
  * 旧知 'long acquaintance'
  * 親友 'close friend'
  * マブダチ slangish way of saying 'close friend'
  * 連れ 'partner'
  * 相棒 'partner (of a duo)'
  * 友達以上恋人未満 'friend or more but less than a lover'

