Why do JLPT N1 learners confuse 密か with 各種?

Both words occupy adjacent semantic territory, which is exactly why the JLPT uses them as distractors for each other on multiple-choice items. The fastest way to stop confusing them is to study them as a pair, write a one-sentence contrast in your own words, and drill the pair specifically rather than each word in isolation.

Is 密か or 各種 more common on JLPT N1?

Both appear in the JLPT N1 curriculum and either may show up on a given exam. Don't try to predict which one the test will choose — learn to distinguish them and you'll be safe regardless. Both belong to the General Adjectives (2) theme of N1 vocabulary.

How do I practice this confusion pair?

Free option: visit /try and pick a confusion drill. Paid option: none — JLPT Mastery is free during launch. Whichever route you take, the engine specifically re-tests pairs you've gotten wrong rather than rotating through general vocabulary review.

JLPT N1 · Advanced · Meaning confusion

密か vs 各種

Q: What's the difference between 密か and 各種?

密か (ひそか) means "secret, private, surreptitious" and 各種 (かくしゅ) means "every kind, all sorts". Both modify nouns to define their scope. 密か (secret) and 各種 (various) both categorize the nature of an action or item, potentially confusing learners in sentences describing the 'type' of a hidden operation.

Why JLPT N1 learners mix up 密か (ひそか, “secret, private, surreptitious”) and 各種 (かくしゅ, “every kind, all sorts”).

密か

ひそか

secret, private, surreptitious

na-adjective

各種

かくしゅ

every kind, all sorts

na-adjective

Theme: General Adjectives (2)JLPT N1

Why these get confused

Both modify nouns to define their scope. 密か (secret) and 各種 (various) both categorize the nature of an action or item, potentially confusing learners in sentences describing the 'type' of a hidden operation.

How to tell them apart

Anchor on the meaning, not the form. 密か (secret, private, surreptitious) and 各種 (every kind, all sorts) live in adjacent semantic territory. Memorize the boundary, not just each word.
Read the example sentences below. Seeing each word in its natural context builds a faster lookup than studying the dictionary form alone.

In a sentence

密か (secret, private, surreptitious)

まさか秘密か？
密かに会ってました。

各種 (every kind, all sorts)

ミーティングは隔週でやってます。
この雑誌の発売日は、隔週水曜日です。

How JLPT tests this pair

On JLPT N1, this pair shows up as a vocabulary meaning question. You see one word and pick its English equivalent from four options — one of which will be the other word in this pair, chosen as a distractor precisely because of the overlap.

Sample item

「密か」の意味は？