Wakaru vs. Shitteiru: Two Ways to “Know” (One Sounds Cold)

知るしる (shiru) is information arriving: the moment a new fact reaches your head. わかる (wakaru) is that same information clicking: it makes sense, and you can work with it.

Start with one sentence that shows both sides:

道はわかりませんが、駅なら知っていますみちはわかりませんが、えきならしっています (michihawakarimasenga,ekinarashitteimasu)

The way there is not clear to me, but I do know the station.

Use 知っていますしっています (shitteimasu) when a fact has already reached you, and わかりました (wakarimashita) when an explanation makes sense. Do not answer a lost stranger with 知りませんしりません (shirimasen). Say すみません、ちょっとわかりません (sumimasen,chottowakarimasen) instead.

English rolls both into “know,” which is exactly why this pair keeps confusing you.

Get the split right and two famous mysteries solve themselves. First, why “I know” is 知っていますしっています (shitteimasu) but “I don't know” is 知りませんしりません (shirimasen). Second, why answering a stranger's question with 知りませんしりません (shirimasen) can come across as surprisingly cold.

知るしる (shiru) doesn't mean “to know” — it means “to come to know.” It's an event, not a state: the moment a fact enters your head. 昨日きのう (kinou)知りましたしりました (shirimashita) means “I found out yesterday.”

That's why “I know” needs the 〜ています (~teimasu) form. 知っていますしっています (shitteimasu) means “the information has arrived and is still here,” so you are describing the state that arrival left behind.

Ask a Japanese speaker この店を知っていますかこのみせをしっていますか (konomisewoshitteimasuka), “do you know this shop?” and you are really asking whether the shop has ever entered their world.

わかる (wakaru) is understanding: meaning falling into place. 日本語がわかりますにほんごがわかります (nihongogawakarimasu) doesn't claim you've collected Japanese facts — it says Japanese makes sense to you. Note the が (ga): things become clear to you, so the thing takes が (ga), not を (wo).

This is also why わかりました (wakarimashita) is what you say to teachers and coworkers. It means “understood, got it, will do.” It reports a click, not a new record in your memory.

わかる (wakaru) also covers “can tell” and “can figure out”: 地図を見てもわかりませんちずをみてもわかりません (chizuwomitemowakarimasen) = “even looking at the map, I can't work it out.”

Positive: 知っていますしっています (shitteimasu). Negative: 知りませんしりません (shirimasen), not 知っていませんしっていません (shitteimasen). The state form is not used in the negative here, because Japanese treats “I don't know” as “that information never arrived.”

It's one of those quirks you memorize once and never think about again: know = 知っていますしっています (shitteimasu), don't know = 知りませんしりません (shirimasen). Textbooks agree, natives agree, the exception has no exceptions.

知りませんしりません (shirimasen) declares “that has never entered my world.” It can therefore suggest “…and it's not my problem.”

That is fine for neutral facts. It sounds chilly when someone asks about a person you would be expected to care about, or when a lost stranger needs help.

The warm default when you're asked something you can't answer is わかりません (wakarimasen) — “I can't say / I can't figure it out.” For directions you don't know, say すみません、ちょっとわかりません (sumimasen,chottowakarimasen). It softens the miss into “I tried, but no luck” instead of “not my department.”

Screenshot this one — it covers nearly every everyday case:

Use 知っていますしっています (shitteimasu) when the fact has arrived, and わかります (wakarimasu) when it makes sense to you.

The negative of 知っていますしっています (shitteimasu) is 知りませんしりません (shirimasen), never 知っていませんしっていません (shitteimasen).

When you cannot answer a stranger, say わかりません (wakarimasen), because 知りませんしりません (shirimasen) can sound cold.

When you're about to say “know,” ask one question. Am I reporting that the information exists in my head (知っていますしっています (shitteimasu))? Or that something makes sense and can be figured out (わかります (wakarimasu))?

That single fork sorts almost every sentence.

Then drill it until the fork is automatic. The quiz below mixes both verbs in real situations, including the cold-知りませんしりません (shirimasen) trap. One day the split itself clicks.