How to Say a Full Sentence in Japanese: Formal and Informal Ways

In this guide, we will explore how to say a full sentence in Japanese, both formally and informally. Whether you’re planning a trip to Japan, studying the language, or just curious about Japanese expressions, this guide will provide you with useful tips, examples, and regional variations where necessary.

Formal Japanese Sentences

Formal Japanese language is used in professional situations, when speaking to elders or superiors, or when a higher level of respect is required. Here are some tips and examples of formal sentences:

1. Use Honorifics

When addressing someone of higher status or age, it is important to add honorifics after their name. “San” is a common honorific, used after the name of the person you are speaking to. For example:

Watashi wa Tanaka-san desu. – I am Mr./Ms. Tanaka.

2. Polite Sentence Endings

In formal situations, it is customary to use polite sentence endings. Here are some examples:

  • Masu form: add “masu” at the end of verbs.
    Example: Ikimasu. – I go.
  • Desu: used to make a sentence polite.
    Example: Hai, arigatou gozaimasu. – Yes, thank you.

3. Keigo (Formal Language)

Keigo is a highly formal form of Japanese and is commonly used in business settings. It requires extensive knowledge and is beyond the scope of this guide. However, it’s important to be aware of its existence.

Informal Japanese Sentences

Informal Japanese, also known as casual or plain language, is used with friends, family members, or people of the same age group. Here’s how to construct informal sentences:

1. Drop Politeness

In informal situations, honorifics and polite sentence endings are not necessary. You can simply drop them and use plain forms of verbs and sentence endings. For example:

Watashi wa Tanaka. – I am Tanaka.

2. Friendly Sentence Endings

Informal sentences often end in sentence endings that convey familiarity or friendliness. Here are some examples:

  • ~ Yo: adds emphasis or excitement.
    Example: Genki desu yo. – I’m doing great!
  • ~ Ne: seeks agreement or confirmation.
    Example: Ashita asobi ni ikimasen ka ne? – Shall we go out to play tomorrow?

3. Slang and Casual Expressions

Informal language allows for the use of slang and casual expressions. These can vary depending on the region, so it’s essential to be aware of local variations. Here’s an example:

In Kansai dialect (spoken in western Japan):
Ikou yo! – Let’s go!

Regional Variations

While Japanese is a standardized language, there are some regional variations in vocabulary and pronunciation. Here are a few examples:

1. Kansai Dialect

As mentioned earlier, the Kansai dialect is spoken in western Japan. It has a distinct vocabulary and pronunciation differences compared to standard Japanese. For instance:

  • Standard Japanese: Watashi wa genki desu. – I’m fine.
  • Kansai Dialect: Ore wa genki ya. – I’m fine.

2. Tohoku Dialect

The Tohoku dialect is spoken in the northern region of Japan. It has its own set of vocabulary and grammatical patterns. For example:

  • Standard Japanese: Koko wa doko desu ka? – Where is this place?
  • Tohoku Dialect: Koko wa chekkei be? – Where is this place?


Learning how to say a full sentence in Japanese requires understanding the context, formality, and regional variations. In formal situations, honorifics, polite sentence endings, and keigo should be used, while informal language drops politeness and incorporates friendly sentence endings. Regional variations add an exciting touch but require extra attention. Keep practicing and immersing yourself in the Japanese language to become more fluent and confident. Ganbatte kudasai! (Good luck!)

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