Casual Speech Culture — Korea Uses Age, Japan Uses Relationship

Both Korea and Japan distinguish between polite and casual speech, but when to switch to casual speech differs completely.

Korea: Age = Everything

The core criterion for casual speech in Korea is age.

• "How old are you?" is natural upon first meeting

• Same age = "friends" who can immediately use casual speech

• Even 1 year older = 형/누나 (elder) → must use polite speech

• Same age alone enables instant switch ("Oh we're the same age! Let's drop formalities")

Japan: Relationship = Everything

The criterion for tameguchi (casual speech) in Japan is relationship closeness.

• Same age → polite speech (です/ます) is default when first meeting

• Over time, as relationship deepens, naturally switch to casual

• Explicit proposal "let's use casual" (タメで話そう) sometimes needed

• Switching without proposal is rude

At work, senpai/kohai (senior/junior) takes priority over age. Using polite speech to a younger senpai is normal.

Culture Clash Situations

Koreans in Japan: Confirm same age and switch to casual → Japanese person feels offended

Japanese in Korea: Keep using polite speech with same-age Korean → Korean feels "they're keeping distance from me"

Cultural Background

Korea's age-based system comes from Confucian hierarchy. Same age = equal status = casual speech is natural.

Japan's relationship-based system comes from uchi (in-group) / soto (out-group) consciousness. Even same-age people who are still "soto" receive polite speech.