Summary: ‘Kusa-fueru’ (草生える) literally translates to ‘grass grows.’ In Japanese internet slang, it is a way to express laughter. It evolved from ‘w’ (warau) to ‘www’ (resembling grass) to the full phrase ‘kusa ga haeru’ or ‘kusa-fueru’, indicating that the situation is so funny that ‘grass has grown’ on the screen.
If you have spent any time on X (formerly Twitter) or Japanese gaming forums, you have likely seen a string of ‘w’s following a sentence. Initially, ‘w’ stood for warau (to laugh). However, when too many ‘w’s are strung together, they look like blades of grass standing up on a field. This is the origin of the term kusa (grass). When someone says kusa-fueru, they are essentially saying, ‘the grass is growing’—meaning, ‘I am laughing uncontrollably.’
Living in Japan, I have seen this evolve from a niche 2channel (now 5ch) aesthetic into a mainstream term used by everyone from teenagers to tech-savvy office workers. It is the Japanese equivalent of ‘LOL’ or ‘LMAO,’ but with a unique visual flair that is quintessentially Japanese internet culture.
The Nuances of ‘Kusa-fueru’
While kusa-fueru is popular, you need to be careful with its usage. It is strictly internet slang. You would never use this in a business email or in face-to-face conversation with your boss. Doing so would be seen as incredibly immature or even disrespectful. It belongs firmly in the realm of casual, digital communication.
Common Mistakes Foreigners Make: One of the biggest pitfalls is trying to say ‘kusa-fueru’ out loud in casual conversation. While some younger people might ironically say it as a joke, it usually sounds awkward. Stick to using it in text formats—LINE, Discord, or social media—where the visual context of ‘grass’ actually makes sense.
Pro-tip: If you want to take your slang game to the next level, look out for variations like kusa-hayashita (I grew grass/I laughed) or daisougen (big meadow), which implies you are laughing even harder than just a regular ‘kusa’.
For more insights into the nuances of digital communication, you might want to check out how other slang shapes the local vibe, such as our guide on Yaba-tan Meaning or the more complex emotional expressions like Tsurai Meaning.
User A: Did you see that fail video?
User B: Yeah, I literally ‘kusa-fueru’ right now! (Laughing)
Ultimately, kusa-fueru is a testament to how Japanese netizens take the simple concept of a laugh and turn it into a shared, evolving language. It is a lighthearted way to connect in digital spaces, provided you know when to keep the grass in the keyboard and out of the boardroom.
