nowfound

Life & fun · August 10, 2025

Seikai TV

I had a successful startup exit five years ago (we got very lucky) but recently realized I'm most happy when building software products. I spend the last ~2 months building this as a fun way to get back into software development; and to find out what all the kids are up to these days. I am also a passionate life-long Japanese learner so this project was really fun. It's been nutz how different things are now with all the AI whatnot. This for sure would have taken me a year, without all the AI. I did not spend much time doing market analysis or any of that jazz. Mostly because I was…

Seikai TV launched on August 10, 2025 with 8 votes, #2,487 of 8,530 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 1 year on.

Visit seikai.tv ↗Seikai TV alternatives

What it does

SeikaiTV extracts, translates and organizes Japanese vocabulary from any YouTube video. Now it's super easy to study just the words you don't know for all your videos.

Learn Japanese watching YouTube Videos

SeikaiTV extracts, translates and organizes Japanese vocabulary from any YouTube video. Choose from our curated collection of Japanese YouTube videos to get started, or import any video with subtitles from YouTube. Review words and phrases at your level. The words you learn will not appear again even in different forms or conjugations. Study ahead and watch your video without subtitles, or pick any word and instantly jump to where it's used. At home or on the go, you can review words from your videos with our spaced repetition, flashcard system or export to Anki. SeikaiTV is designed from the ground up for Japanese only, with none of the annoying compromises that come from handling many…from seikai.tv

In the maker’s words, at launch

I had a successful startup exit five years ago (we got very lucky) but recently realized I'm most happy when building software products. I spend the last ~2 months building this as a fun way to get back into software development; and to find out what all the kids are up to these days. I am also a passionate life-long…

Does a similar job

all alternatives →
  • Zeno2025 · youzeno.com · ▲244

    Hey guys well basically…yeah…I hate GoogleNoteLLM and other AI YouTube Summarizers. They feel meh…boring. I actually like youlearn.ai but it’s built for students. So, as a builder. I built my own AI YouTube Curator, Zeno, and hit #1 Product of the Week on Product Hunt. What I can say is that Zeno is your AI-powered second brain for YouTube. Ah, btw now it’s fully optimized for mobile, with the most evolutionary features in the AI YouTube summary space yet. The best part? Since this last update, I’ve stopped using YouTube. I only Zeno. With Zeno 2.0 on mobile, you can: Import your favorite…

  • I made a website that converts YT videos into step-by-step guides2024 · stepify.tech · ▲271

    Hey HN, I've been working on this side project for the past month. It generates a step-by-step tutorial guide for YouTube videos that you can follow along without watching long videos. Best suited for tutorial videos but can work for other videos aswell. No BS. Just straight to the point. The guides are generated from pure transcript so you don't have to worry about it being AI. It's my first project as a total beginner. Something I had to do inorder to get out of tutorial hell. Please let me know if you have any suggestions or if you face any problems or bugs. I would try to fix them to the…

  • IM
    I'm making an open-source platform for learning Japanese2025 · kanadojo.com · ▲288

    The idea is actually quite simple. As a Japanese learner and a coder, I've always wanted there to be an open-source, 100% free for learning Japanese, similar to Monkeytype in the typing community. Unfortunately, pretty much all language learning apps are closed-sourced and paid these days, and the ones that are free have unfortunately been abandoned. But of course, just creating yet another language learning app was not enough - there has to be a unique selling point. And then I thought to myself: why not make it crazy and do what no other language learning app ever did by adding a gazillion…

  • Generate Anki Decks from YouTube Videos to Anki Converter2025 · asimpleai.com · ▲6

    Hello! I love anki and have been using it for years to learn mandarin, but I'm lazy and always struggled to get over the "motivation hump" to sit down and create a deck. Recently I've been consuming a lot of AI content from youtube, and spent 3 days creating a deck for Andrej Karpathy's "Deep Dive into LLMs" video. This is impractical - so I built a little youtube to anki converter @ asimpleai.com It's rough around the edges... but I would like it to eventually become something useful to community. Feedback and suggestions are welcome! peace

  • I built the literal Duolingo KillerNov 2025 · kanjieight.vercel.app · ▲11

    Hi Everyone, I recently wanted to learn Japanese with duolingo but it kept giving me repetitive lessons. So I built an app that gives a variety of lessons from anime. You can try it out here:https://kanjieight.vercel.app/ Thanks everyone.

  • I made a language tool that forces you to talk2025 · hanasu.ai · ▲5

    Hey HN! I created Hanasu.ai after my 9-5 job as a side project. Previously I'd used Duolingo to learn Japanese, but failed spectacularly when I actually spoke with my roommate from Tokyo. Now, after OpenAI improved their Realtime audio model in December and reduced pricing, I spent my entire winter break building. So how does it work? Just choose a daily topic and converse with the AI model: (1) Didn't catch a phrase? Double tap to reveal a transcript. (2) Couldn't understand? Double tap for translations powered by Google. (3) Can't recall that intricate Chinese/Japanese character? Just…

More life & fun this month

the category →

Source: Product Hunt launch ↗ · launch text quoted in part

Launched alongside, August 2025

the whole month →
  • Trace▲1,555

    Workflow Automations for the Human 👾 AI Workforce

    AI · 2025 · trace.so

  • I spent 6 years building a ridiculous wooden pixel display▲1,145

    I built the world's most impractical 1000-pixel display and anyone in the world can draw on it. It draws a single pixel at a time and takes 30-60 minutes to complete a single image. Anyone can participate in the project by voting for the next image to be drawn, and submitting images. https://kilopx.com/

    Work · 2025 · benholmen.com

  • Indy AI by Contra▲1,070

    Job boards are dead. Your network is alive

    AI · 2025 · contra.com

  • Kitten TTS – 25MB CPU-Only, Open-Source TTS Model▲1,003

    Kitten TTS is an open-source series of tiny and expressive text-to-speech models for on-device applications. We are excited to launch a preview of our smallest model, which is less than 25 MB. This model has 15M parameters. This release supports English text-to-speech applications in eight voices: four male and four female. The model is quantized to int8 + fp16, and it uses onnx for runtime. The model is designed to run literally anywhere eg. raspberry pi, low-end smartphones, wearables, browsers etc. No GPU required! We're releasing this to give early users a sense of the latency and voices…

    AI · 2025 · github.com

  • I was curious about spherical helix, ended up making this visualization▲865

    I was wondering how I can arrange objects along a spherical helix path, and read some articles on it. I ended up learning about parametric equations again, and make this visualization to document what I learned: https://visualrambling.space/moving-objects-in-3d/ feel free to visit and let me know what you think!

    Life & fun · 2025 · visualrambling.space

  • The current sky at your approximate location, as a CSS gradient▲788

    For HTML Day 2025 [1], I made a web service that displays the current sky at your approximate location as a CSS gradient. Colours are simulated on-demand using atmospheric absorption and scattering coefficients. Updates every minute, without the use of client-side JavaScript. Source code and additional information is available on GitHub: https://github.com/dnlzro/horizon [1] https://html.energy/html-day/2025/index.html

    Dev tools · 2025 · sky.dlazaro.ca