Rikaichan and Rikaikun
Browser addons: Mouse over Japanese to view its translation.
Rikaichan and Rikaikun launched on January 4, 2016 with 4 votes. The site was not reachable when checked in September 2026.
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Learn Japanese contextually while browsingDec 2025 · lingoku.ai · ▲92Hi HN, Just wanted to share a tool i've been working on to help with my own study routine. It’s a browser extension called Lingoku. The idea is simple: we spend hours browsing the web in English every day. This tool replaces some of the english words with Japanese vocabulary based on your japanese level (Similar to Toucan, but with a better user experience). It’s basically an attempt to make the "i+1" method actually passive, you understand the sentence because it's mostly english, but you pick up Japanese words naturally from the context. It uses an LLM in the backend to make sure the…
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