「〜をはじめ」 introduces a representative item before expanding to a broader group of the same type. This guide covers its three common forms, examples, differences from 「〜など」 and 「〜を中心に」, and its relationship to Korean 「-을/를 비롯해」.

「〜かねない」 does not mean “cannot”; it expresses the possibility of an undesirable result. This guide covers its formation, common uses, business and news contexts, and how it differs from 「〜かもしれない」, 「おそれがある」, and 「〜かねる」.

Japanese 「〜最中に」 describes another event occurring while an action is right in progress, often with an unexpected or interruptive nuance. This guide covers attachment patterns, examples, real-life situations, and comparisons with 「〜ときに」「〜間に」 and Korean 「-는 중에」.

「〜そばから」 is used when an undesirable result follows immediately after an action and often keeps recurring. This guide covers its forms, major usages, examples, and contrasts with 「〜たとたんに」, 「〜次第」, 「-자마자」, and 「-는 족족」.

「ではありません／じゃありません」 are polite Japanese negative forms used mainly with nouns and な-adjectives. This guide explains their difference in formality, plain forms, い-adjective negation, practical travel and workplace examples, and comparison with Korean negative forms.

「〜極まる」 and 「〜極まりない」 express an extreme degree in Japanese and are commonly used in formal writing, news, commentary, and strong criticism. This guide covers their meaning, attachment patterns, register, differences, examples, and Korean comparison.

Japanese 「AはBです」 is one of the most fundamental sentence patterns in Japanese. This guide explains its topic-and-explanation structure, common uses for identity, places, time, and contrast, and how it differs from 「AがBです」.

「〜次第だ」 does more than vaguely mean “it depends.” It identifies the condition that determines an outcome. This guide explains noun＋次第だ, 次第で, and 次第では through examples involving effort, weather, conditions, and responses, compares them with 〜による and Korean equivalents, and distinguishes separate uses such as 分かり次第.

Japanese 「〜し」 can list multiple reasons, present one reason while implying others, and leave a conclusion unstated at the end of a sentence. This guide covers its attachment patterns, major uses, comparisons with 「〜から／〜て」, conversational usage, and related Korean forms.

「〜たつもり」 expresses a subjective belief that an action has already been completed, even when reality may be different. This guide compares it with related 「つもり」 patterns and explains its use in understanding, hypothetical mindsets, and business situations.

Japanese academic writing involves more than changing 「です・ます」 to 「である」. It requires clear scope, evidence, and inferential relationships. This guide explains 「である調」, objective inference, formal connectors, and common structures used in Japanese university reports and research abstracts.

〜つもり emphasizes personal intention, decisions, and intent, while 〜予定 focuses on established plans and schedules. The article also covers negative forms, extended uses of つもり, common errors, practical dialogues, and a comparison with Korean -(으)ㄹ 생각이다／예정이다.

The key to 「〜ていく／〜てくる」 is not a simple “go vs. come” translation, but the direction of movement after an action relative to a reference point. This guide compares 「買っていく／買ってくる」 and 「持っていく／持ってくる」 with practical examples.