On page 82 and 83 of Japanese for Busy People II (third edition), there's the following sentence (written mainly in kana with only a small amount of kanji)


And a definition of じつは as "actually". jisho.org's definition only has notes of "Expression, Adverb", though when I played the sound for it in an app called "Shirabe jisho", it pronounced the は as a わ, presumably because is the particle は.

Apart from playing the sound for a word, is there any way I could have looked up whether the "は" was a particle "は" or not, either from a dictionary or examining the grammar of the sentence?


Only a few words contain "は pronounced wa" as part of their formal spelling, so it's best to memorize them and get used to them.

Etymologically, all of these は are thematic-wa.

※: These are used like (sentence) adverbs, but they may or may not be single-word expressions. Some dictionaries seem to treat these as lexicalized 副詞 (adverbs).

  • To add to what naruto is saying: if you look up a word in the dictionary and the word ends with a は written in hiragana, it's almost always a thematic は pronounced "wa". It can be confusing when you're using study materials with lots of kana, but if you look up じつは and the dictionary says it's spelled "実は", you can be very confident that's a topic-marker は。There are plenty of words that end in a ha-sound, but they're almost always at least optionally written in kanji unless it's a sound like "ははは!"
    – mamster
    Mar 30 '18 at 15:45

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