The difference between written language and conversational language in Japanese is much greater than in English.

Also remember that in Japanese culture formal speech by itself doesn't mean less friendship.

When you're the older one, you should start using the informal register and invite your friend to do the same. Translation for 'informal' in the free English-Japanese dictionary and many other Japanese translations.

The phrase dictionary category 'Personal| E-Mail' includes English-Japanese translations of common phrases and expressions. You’re in Japan, but don’t know a word of Japanese? If you want to know how to say informal in Japanese, you will find the translation here. Learn Japanese fast!

We hope this will help you to understand Japanese better.

If you are not familiar with verbs yet, read "Japanese Verb Groups" first.Then, learn "The ~te form," which is a very useful form of the Japanese verb.
In this lesson, you will learn how to conjugate Japanese verbs in the present tense, past tense, present negative, and past negative. Whether you're talking to a new acquaintance, a friend, an elder, and so on, the person you're talking to in Japanese makes all the difference, …
We’ve prepared a list of 20 simple Japanese phrases for anyone that doesn't speak Japanese! There are three main levels of politeness in Japanese: teineigo ("standard" polite language), kudaketa nihongo (casual speech) and keigo (very polite/honorific language). To come across the right way, you need to know when and how to use formal and informal Japanese.

Japanese letters often use classical grammar patterns which are seldom used in conversation.

informal translate: 堅苦しくない, 普段の. Even if you don’t have the time to properly learn Japanese and you don’t have anyone to teach you, all you have to do is open this article and read out these easy phrases. Although there are no particular rules when writing to close friends, there are many set expressions and honorific expressions used in formal letters.

Learn more in the Cambridge English-Japanese Dictionary.