「〜とは限らない」 does not completely negate a statement; it removes the certainty that it must always be true. This guide covers its meaning, attachment patterns, common uses, double-negative 「〜ないとは限らない」, comparisons with 「〜わけではない」 and 「〜とは言えない」, travel examples, and Korean equivalents.

「いつ」 asks broadly “when,” 「何時」 asks for a specific clock time, and 「何分」 asks about minutes or duration in minutes. This guide also compares 「いつごろ／何時ごろ／何分くらい／どのくらい」, explains the particle 「に」, and covers practical hotel, reservation, and station examples plus Korean equivalents.

「〜ことになっている」 describes a rule, arrangement, or established practice that has already been decided and remains in effect. This guide covers its formation, three major uses, differences from 「ことにしている」 and 「ことになった」, practical travel examples, and its relationship to Korean 「-기로 되어 있다」.

「〜ようとしている」 does more than mean “soon.” It describes an action or change approaching the point where it happens and can also mean “trying to” with human actions. This guide covers its formation, three main uses, similar Japanese patterns, and its relationship with Korean 「-(으)려고 하다」.

A complete guide to telling time in Japanese, covering special hour readings, ふん／ぷん minute pronunciation, small-っ changes, 午前 and 午後, 半, ごろ, 前, 過ぎ, midnight and noon, 24-hour notation, 24時 and 25時, practical travel phrases, and a comparison with Korean time expressions.

A complete guide to Japanese 「この・その・あの・どの」, covering their basic meanings, 「その」 vs. 「あの」, differences from 「これ・それ・あれ・どれ」 and 「ここ・そこ・あそこ・どこ」, plus practical travel examples.

A practical guide to Japanese こちら, そちら, あちら, and どちら, covering distance, politeness, people, locations, choices, customer service, travel, and business usage.

A detailed guide to the meaning and nuance of Japanese 「わけがある」, including how it differs from 「理由がある」 and 「事情がある」. The article also compares 「わけがある」 with 「わけだ」, 「わけがない」, and 「はずだ」, explains its attachment patterns, and covers common expressions such as 「ちょっとわけがあって」 and 「訳あり商品」 with examples.

A complete comparison of the Japanese formal nouns 「こと」「もの」「ところ」 and 「わけ」, including attachment rules, fixed patterns, examples, and related expressions.

Learn when Japanese 「何」 is read as nani or nan, including core patterns, counters, and meaning-based exceptions, with examples and comparison tables.