30 Japanese Internet Slang Words Explained: Kusa, www, Enjo, Kidoku Suru and More

💡 Laughing online used to be typed as "www" (from warau, to laugh), and a row of w's looks like grass growing. So "grass" came to mean laughing. It is mainly written. Saying it aloud is possible among young people, but it sounds deliberately jokey.

💡 The number of w's shows how hard you laugh. A single "w" can feel slightly mocking to some readers, and a long row can look childish. Some people now prefer kusa or an emoji instead.

💡 A playful misspelling of waratta (I laughed), from 2000s message boards. It now sounds a bit retro, which is part of the joke when people use it today.

💡 Otsukaresama shortened, then written with the kanji that is read otsu. Common after a stream or a game session. Never use it with a boss or client; say otsukaresama desu in full.

💡 Google turned into a Japanese verb. It is so common that most people don't think of it as slang anymore, although in writing for work you would say kensaku suru (search).

💡 Neta (the material, the trick) + bare (being revealed). Used by all ages. Many sites and posts start with "netabare chui" (spoiler warning).

💡 Kami (god) is a common prefix meaning "amazing": kami gemu (great game), kami taio (excellent customer service). It is praise, never religious.

💡 Originally a joke about people inside mascot costumes. Many fans follow the rule that mascots have "no one inside," so pointing it out too directly can be seen as rude or unromantic. Also used for whoever runs a company's social media account.

💡 Literally "going up in flames." It is not a joke word: companies publish apologies, and people can lose jobs or sponsors over it. News programs use it too, so it is standard Japanese now.

💡 Kidoku is the "Read" mark in the LINE messaging app, and suru comes from English "through" (ignore). Many Japanese people feel pressure to reply quickly. The related midoku mushi means ignoring a message without even opening it.

💡 Short for suteruzu maketingu. It means advertising that pretends to be an honest opinion. Japan began regulating it as misleading advertising in October 2023, so influencers now mark sponsored posts with labels like PR.

💡 The original meaning is "to charge a fee," but players use it for spending money themselves. Mukakin means free-to-play, and fans also joke that buying concert tickets is "kakin" for their favorite.

💡 Sei means a group or force. From online gaming, now used for any hobby: running, camping, idol fandom. It is a quick, friendly way to say how serious you are.

💡 Short for riaru ga jujitsu shite iru (real life is fulfilling). It started as a half-envious internet word, often about people with a partner. It sounds a little dated now but is widely understood.

💡 From hitoribotchi (all alone). It can be self-mocking and light, like "hitori karaoke" or solo camping, which are normal hobbies in Japan. Calling another person a botchi can hurt, so use it about yourself.

💡 A pun on tsumu (to pile up) and doku (to read). The word is much older than the internet but has become popular with book lovers online, and it is known in English too. Gamers say tsumige for games they bought and never played.

💡 Literally "pilgrimage to holy sites." Some towns welcome fans and use it to attract tourists. Please be respectful: many locations are homes, schools or quiet shrines where people live and pray.

💡 The original meaning is religious missionary work, so the slang use is a joking exaggeration. Fans say it when they lend DVDs or send links to get friends hooked.

💡 Short for owatta kontentsu (finished content). It can be harsh when said about someone's hobby or work, so be careful using it in front of fans.

💡 Chuni means the second year of junior high (about age 13 to 14). It is not an illness; it is a funny label for trying too hard to seem special, like naming your powers or wearing a bandage for style. The term is often traced to a late-night radio show in the late 1990s.

💡 From moeru (to sprout). It became famous in the 2000s, and inside Japan many fans now feel it sounds a little old; words like totoi or suki are more common today. "Gappu moe" (the charm of an unexpected side) is still widely used.

💡 Tsun-tsun (prickly) + dere-dere (lovey-dovey). A classic anime character type, now used for real people and especially for cats. It is known well beyond otaku circles.

💡 Shi is a formal title used in newspapers. Online it gives a funny, slightly nerdy politeness, often used between gaming or anime friends. In real business writing it is still formal and serious.

💡 From kita (it came) + kore (this). The consonant-only spelling ktkr is from the message-board era and now looks retro. You'll still see it in comments when big news drops.

💡 Look at it sideways: o is the head, r the arms and body, z the bent legs. It shows defeat or deep disappointment, usually in a funny way. It feels old-school now but is still recognized.

💡 Hachi (eight) sounds like pachi, the sound of clapping. You'll see a flood of 8s in live-stream comments after a song or a good play. It is a kind, positive reaction.

💡 Short for omae no kankyo (your environment), from PC gaming. Omae is a rough "you," so the word can sound dismissive. Use it about your own problems or with close friends.

💡 Ita comes from itai (painful), a self-aware joke that it is embarrassing to look at. Owners are usually proud of them, and itaba bags full of badges are a common sight at concerts and events.

💡 Usually held twice a year, in summer and winter, in Tokyo. Fans sell self-published comics and goods, and cosplay is a big part of it. The crowds are enormous, so fans trade tips on heat, lines and what to bring.

💡 A joking exaggeration used for a meme, a game screen or an error message you see all the time. It is not about family at all.