About
About Gairaigo.Jepang.org
When I first started learning Japanese over a decade ago, I honestly thought katakana was my friend. The characters looked way simpler than kanji, they often sounded just like English words, and it felt like a nice little shortcut. Well, I was completely wrong. What I thought was a friend quickly turned into a headache.
Gairaigo.Jepang.org was born exactly from that frustration. It is a practical tool designed to help you tackle Japanese loanwords that seem familiar at first glance, but are secretly plotting to trick you with shifted meanings, mixed origins, or bizarre usages.
Why Build This Site?
It is simple: I built this because I desperately needed a tool like this back then. I wanted a single, neat place to look up a gairaigo word, see its actual meaning, check where it really came from, and figure out if it was a pure loanword, a Wasei-Eigo (Japan-made English) term, a weird abbreviation, or some chaotic mix of everything.
The biggest trap with katakana is false familiarity. A lot of words feel easy because they look like English. But the truth is, meanings often drift entirely, forms get chopped in half, or they end up being used with nuances that make zero sense to a native English speaker.
Not Just Another Dictionary
I specifically avoided setting this up as just another rigid dictionary list. Based on how I actually learn, it is never just "look up a word and close the tab." I needed to see the underlying patterns: what category does this word fall into? What language is it actually from? And what other words follow this same weird logic?
That is why this site offers three main ways to explore: Categories (to group by topic), Source Languages (to track down the true origins), and Types (to see how the words were formed). It is built for browsing, wandering, and discovering—not just typing a word and leaving.
An Engineer’s Perspective
I am Septian Ganendra S. K. (sepTN). I am the creator of Jepang.org and a Software Engineer who loves building Japanese learning tools, structured datasets, games, and open-source projects. That technical background heavily shapes Gairaigo.Jepang.org. For me, the data has to be well-structured, the pages need to load instantly, and the navigation actually has to make sense.
I never wanted this to be just some massive, lifeless database dump. My hope is that it feels like a reliable little pocket tool you can reach for whenever katakana starts feeling like a trap.
Purely Here to Help
The core data comes from the JMdict project, but I have specifically filtered it for gairaigo and restructured it to be much friendlier for learners. If the data backing a word’s origin or status is sketchy or unclear, we simply will not force a claim.
The goal is straightforward: to help you defeat that annoying little boss known as "the word that looks easy but is actually a lie." I built this site to be the weapon I wish I had back in the day, and I hope it saves you some of the time and frustration I went through.
Sources and Claim Limits
Entry data starts from JMdict and is reshaped for learners, with internal examples and prebuilt external examples shown when available. Labels such as source language, Wasei-Eigo, or formation type appear only when the stored data supports them.
For details about sources, attribution, and limits, see the Data Sources page.
Correction Path
If a meaning, example, source note, or wording feels wrong, you can send a report through the Corrections page. Reader reports are checked against available evidence before public content changes.
The review approach is explained in the Editorial Policy page.