日本は火山列島だ。

日本は火山列島だ。

Japan is made up of volcanic islands.

日本(にっぽん)は火山列島(かざんれっとう)だ。

Nippon wa Kazanrettō da.

日本 (にほん、にっぽん)

Japan

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

火山列島 (かざんれっとう)

chain of volcanic islands

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: ニチ、ジツ、ひ、 -び、 -か

Meanings: day, sun, Japan, counter for days

Readings: ホン、もと

Meanings: book, present, main, origin, true, real, counter for long cylindrical things

Readings: カ、ひ、 -び、ほ-

Meaning: fire

Readings: サン、セン、やま

Meaning: mountain

Readings: レツ、レ

Meanings: file, row, rank, tier, column

Readings: トウ、しま

Meaning: island