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Why Is は Pronounced Wa? The Particles は, へ and を

The particles は, へ and を are read wa, e and o. Modern kana spelling follows today's sound but keeps these three particles in their older spelling. Learn where the rule comes from, how to spot a particle, why charts label を as wo, and how romaji writes them.

Inku editorial team · · 4 min read

When は, へ and を work as particles, they are read wa, e and o. Inside ordinary words, は is ha and へ is he. The spelling is not a typo. Japan's kana spelling rules write words the way they sound today, but they keep the older spelling for these three particles.

  • わたしは がくせいです。 (watashi wa gakusei desu) “I am a student.”
  • がっこうへ いきます。 (gakkou e ikimasu) “I go to school.”
  • みずを のみます。 (mizu o nomimasu) “I drink water.”

The rule in Japan's spelling standard

The standard for kana spelling is 現代仮名遣い (Agency for Cultural Affairs). Its preface says the system writes words by modern pronunciation as a principle, and it makes a set of exceptions to respect established writing habits.

The list of those exceptions starts with these three rules: the particle を is written を, the particle は is written は, and the particle へ is written へ. So the sound is regular. Only the spelling is the exception, and only for the particles.

Where the old spelling comes from

The same preface says that historical kana spelling (歴史的仮名遣い) was the general standard from the Meiji era until the 1946 spelling reform. In that older system, many words used は, へ, ほ or を where the modern sound is wa, e or o. The standard's comparison table of historical spellings gives examples:

  • 川 (kawa, “river”): once written かは, now かわ
  • 家 (ie, “house”): once written いへ, now いえ
  • 顔 (kao, “face”): once written かほ, now かお
  • 男 (otoko, “man”): once written をとこ, now おとこ

Modern spelling moved words like these to わ, え and お so the letters match the sound. The particles kept their old letters. The same table shows it with three phrases: 我は海の子 for wa written は, 西へ進む for e written へ, and 花を見る for o written を.

How to tell a particle は from a word

A particle comes after a word and shows its role in the sentence. A useful check: first find where each word starts. If は or へ starts a word or sits inside one, read it ha or he. If it follows a complete noun or phrase and links it to the rest of the sentence, it is the particle: in きょうは はれです。 (kyou wa hare desu, “Today it is sunny.”), the first は is wa and the second is ha.

  • はな (hana, “flower”): part of the word, so ha
  • はなは きれいです。 (hana wa kirei desu) “The flowers are pretty.” The first は is ha; the second is wa.
  • へや (heya, “room”): part of the word, so he
  • へやへ いきます。 (heya e ikimasu) “I go to the room.” The first へ is he; the second is e.

Some common expressions keep a particle は inside them. The standard lists こんにちは (konnichiwa), こんばんは (konbanwa), または (mata wa, “or”) and ではさようなら (dewa sayounara, “well then, goodbye”). Read each は in them as wa.

Not every wa sound is spelled は. The rules say the sentence-ending わ in a phrase such as きれいだわ falls outside the は exception, so it is written わ.

Is を “wo” or “o”?

Many kana charts label を as wo, including the Inku hiragana chart. The romaji notice describes the older wo spelling as one that shows the kana table in a regular pattern, and says such spellings may be used in personal and organization names. For the sound, the December 2025 romaji rules, ローマ字のつづり方 (Cabinet notice, PDF), write ヲ as o and mark it as a kana treated as having the same sound as another kana today. Their comparison table shows that wo was the spelling in the second table of the 1954 rules.

The same notice also covers sentences in romaji: the particles は, へ and を are written wa, e and o. Textbooks also write watashi wa, not watashi ha.

What this rule does not cover

This rule tells you how to read the particles, not when to use them. For the difference between は and が, see wa vs ga. For へ, を and the other core particles in sentences, see the Japanese particles masterclass. The greetings こんにちは and こんばんは are covered in Japanese greetings.

Practice both readings

Open the Hiragana deck in Inku's free browser flashcards. The cards for は, へ and を show their chart readings: ha, he and wo. When one of them comes up, say the chart reading first. Then say a short phrase from this post that uses it as a particle, such as はなは (hana wa), がっこうへ (gakkou e) or みずを (mizu o). The deck needs no account, and its progress stays in your browser.

Sources

Prepared by our editorial team with AI assistance. Product details are checked against the sources below.

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