The 5 essential Japanese particles: wa, ga, wo, ni, de
Particles are what structures a Japanese sentence. Five of them cover 80% of everyday Japanese. This guide gives a quick overview, and each has its own deep-dive article.
Why particles first
Japanese is an agglutinative language: you stack markers behind each word to signal its role. Word order is free because position doesn't signal subject or object, the particle does. 田中さんが本を読む (たなかさん が ほん を よむ) and 本を田中さんが読む (ほん を たなかさん が よむ) mean the same thing: Tanaka reads a book.
The 5 deep-dive articles
Particle 1 / 5は (wa): the topic particle, explainedHow the particle は (wa) works, why it's pronounced "wa" and not "ha", and how to use it in a real Japanese sentence.Particle 2 / 5が (ga): subject marker and the wa vs ga trapHow が marks the grammatical subject, why it's mandatory with certain verbs (好き, ある, 分かる), and how to choose between は and が.Particle 3 / 5を (wo): the direct object particleHow を marks the object of a transitive verb, why it's written を but pronounced "o", and its lesser-known use with motion verbs.Particle 4 / 5に (ni): destination, time, recipient and existenceThe most versatile Japanese particle, in 4 uses: destination of motion, point in time, recipient of an action, location of existence with ある/いる.Particle 5 / 5で (de): place of action, means and materialHow で marks the context of an active action, the means used, or the material of an object, and how to choose between で and に in lookalike cases.And after these five?
Once は・が・を・に・で are reflexive, the next 7 (と・も・へ・の・から・まで・や) are a natural add-on. But don't rush: nail the foundations first.