JLPT Mock Test Tool I am Making

Hello all,

Last December I attempted my N4 but ended up failing only on the grammar section but did very well on the others. I decided that I needed to focus study on not just the grammar but also how the JLPT test questions are structured. To help with this I habe made a site called www.jlptopencatalogue.com.

I know AI makes mistakes but what I have done is gotten it to generate a bunch of test questions by level section and question type, then also built a system to have human verification and review of the questions to make sure they are actually good.

I wanted to share and if anyone finds it useful if you have any feedback it would be wonderful!

Thanks very much!

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Super cool! I like the design and how well it works. Maybe questions are not consistant and do not correspond really well to the real ones (actually really, they were not bad for the most part). But even if sentences and texts are not same as those from JLPT, they test very simmilar stuff, and when I do mitake, which I do, it tels me what I did wrong, and explains the idea of the point, as well as the idea of other respones. Also, it seems to use a right type of vocab.

Some questions are broken of course, but I’m absolutly okey with it.


I personally think, in this case, Japanese person would choose B and jump from the bridge, or do harakiri (clasics).


The ones with audio and reading seem to be quite easy to guess without even listening or reading. On the other side grammar ones are very good (kanji probably too, but I haven’t done enough, saying just from the format). For now I see the most profit in grammar ones.

You are like https://jlpt.migii.net but much better in terms of ui/ux and explanations, minus is that you are AI, and it’s hated on Reddit. Again, on the bright side, Reddit is probably just 1-4% of all people who learn Japanese.

It’s basically the best AI based thing I’ve used so far! I want to use it, so I hope you continue working on it! When you have enough of those quality questions, I beleve you’ll be able make it a paid product, and people will use it.

Recomendations for now are:

  • I think Reading and Listening are the week points, because you can guess from the answers alone. Probably an extra layer of AI self check specifically for answers for those two formats should be there, so it make each answer believable if you don’t know what was the content.
  • “Skip this question” button (for cases when question is unusable)
  • Just as an idea, I think a small ux fix will help a lot. The “Practice” section looks like the entry point of the core functionality, so in my opinion it should be evidently pointed to, so new users won’t get distracted by everything, (now it’s just one of other 5 buttons, while it is actutally the single core feature). I think you could make it somewhat more prominant, so it’s evident where to start when you land on the page for the first time.
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this looks really cool, will use preparing for december tests

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This is by far the greatest feedback i have ever gotten! I truly appreciate your detail and will absolutely work to make it better!

Yes AI is pretty hated, but i think in this context it can for sure be helpful!

Thanks so much again for the details!

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Thanks so much! Happy to help!!

safari tells me the https certificate is for jlptopencatalogue.com but the website has the address www.jlptopencatalogue.com and so it is saying the website is insecure. can you add an alias for the certificate?

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Somewhat minor, but you should consider using a Japanese font. The default font for Asian characters uses Chinese as a base so you end up with some kanji that are harder to read. Looks like this instead of 漢字 for example.

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Super cool!

  • Going to need a more high contrast color mode though, the softness of the palette makes my eyes strain a bit sometimes. = I did see there is a theme change but this does minimal amounts, the side bar information with the slightly differing sand colors are what trips my eyes
  • As mentioned above, a font selector would make a world of difference! = Nevermind, i found there are two possible fonts in the settings after logging in.
  • The spaces between things in the Japanese text is very distracting.
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nice pfp :+1:

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Same to you :+1:

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this is actually great, while i have yet to build a huge streak in bp (i like wk alot, and translating song lyrics as a hobby plus a kanji app and jisho daily visitor) i find it sliiiightly difficult to finish my reviews. though i’ve been having fun with translating the questions in my head, more often I input in the barely right answers (the one that triggers a short msg nudging you)

anyway, i checked it out and the quizzes are fun. though firefox kinda warned me of proceeding with accessing it (no https and bad cert? it said)

ps. is there something special when i know i can detect a site made (i assume not exclusively) with ai lol, i kinda do have that skill. its the font i guess

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Hello all. I made some updates and added a other 200 questions for everyone to explore. Also I was wondering if I should make a discord for the site to get feedback and send update

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Is it possible to use some other TTS model? Sorry to be so direct, but the audio is quite bad imo, are you generating that on your end and storing it and is that in real time generated on one’s browser? Either way is quite off putting, wouldn’t want to do a lot of those audio question with that audio. The other parts of the test look quite nice though, good job on that.

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Yes for sure this is in queue. I want to use eleven labs and pre generate the audio once so it’s not very costly on my end. I also noticed that the same voice is used for different people. It is absolute in queue. Right now working on some stats to determine the best questions I should work on to address my failings using my historical attempts. Thanks a lot for the comment!

I did it! All listening now use high quality native audio models. Give it a look!!

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Hey! I have made some updates based on your comments!

  • I am using better audio for listening questions and removed any hints

  • practice is the main page now and users have skill breakdown on a progress page

  • more examples added to the set

Lots of small bug fixes also! Thanks!!! Also made a discord if your interested :slight_smile:

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Nice, I’ll try it out!

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This is pretty cool. Though I’m not a fan of the font style, checking this out every week should be okay for my schedule.

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I keep getting this certficiate error, might want to temporarily put your effort into fixing this first, Chrome doesn’t even allow to me to open the website anymore:

Your connection is not private

Attackers might be trying to steal your information from www.jlptopencatalogue.com (for example, passwords, messages, or credit cards). Learn more about this warning

net::ERR_CERT_AUTHORITY_INVALID

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Hey! I am seeing this as well and working on it. If possible would you be able to join the discord so I can confirm with you if it works?

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