What Is Kosan? OG Fans, Newbies, Niwaka, TO and Omaitsu Explained

“How long have you been a fan?” It’s a question that makes you wonder whether you count as a newcomer or an old-timer. Everyone’s history of support is different. This guide sorts out the words for a fan’s standing, how their nuance shifts depending on whether you use them about yourself or others, and how to interact well.

What Kosan Means

Kosan (古参) means a fan with a long history who has supported an artist since the early debut days or the unknown years. The opposite is shinki (“new”), someone who has only just become a fan, and there is also the mocking niwaka.

Words for a Fan’s Standing

Just arrivedSince the early days

1. ShinkiRecently became a fan
2. DemodoriLeft once, then came back
3. OmaitsuAlways at the events
4. KosanSupporting since the early years

These words describe when someone joined. They are not ranks.

Said About Yourself It’s Humility; Said About Others It’s an Attack

What defines this group of words is that their meaning flips between self-reference and reference to others. If you say “I’m a niwaka, but…” about yourself, it’s modesty; if you say “you’re just a niwaka” to someone else, it’s an attack. Kosan works the same way: said about yourself, it’s a sentimental remark; when someone else says “you’re acting like an OG,” it’s criticism. TO and omaitsu are also not titles people claim. Others start using them naturally, and they are neither official positions nor qualifications. Remember that words for standing are safe when used as “a description of fact” and blow up easily the moment they’re used as “a claim of rank,” and you will have fewer accidents in the fandom.

About yourself

Humility or nostalgia

• Calling yourself a niwaka sounds modest
• Saying kosan sounds sentimental
• Reads as a description of fact

About someone else

Attack or criticism

• Calling someone else a niwaka is a jab
• Saying they act like an OG is criticism
• Reads as a claim of rank

Use standing words as facts, not as rankings.

How to Tell Them Apart From Similar Words

Kosan are people who have supported since an early stage, shinki are people who found the act recently, and demodori are people who left once and came back. These words describe when someone joined; they are not classes that decide who gets a say or priority.

Examples

• “As a long-time fan, this show at Nippon Budokan is deeply moving.”
• “I’m new! I’m catching up on the old footage.”
• “That person is at every event across the country. Total omaitsu.”
• “When I was a niwaka, an OG fan gave me a starter playlist. That’s what sealed my fall into the numa.”
• “I’m a kosan, but I love reading the energetic reactions of newcomers. It reminds me of my first rush.”

Kosan and Shinki: Their Interests Actually Line Up

The classic flashpoint of fandom is “kosan vs. shinki.” The pride of “I’ve watched since way back” runs into the enthusiasm of “I only just fell for them.” But think calmly and more new fans is proof of your oshi’s popularity, and a result of the OG fans’ support as well.

What healthy fandoms share is a culture in which OG fans hand newcomers a “catch-up list” (past highlights and starter content). The spirit of fukyo (spreading the word) connects the generations.

1. 01Newcomers arriveProof that the oshi is popular
2. 02OG fans share a listHighlights and starter content
3. 03Newcomers catch upAnd share fresh reactions
4. 04OG fans feel renewedRecalling their own first rush

↻ and back to the start

Each side supplies what the other is missing.

A Note for Newcomers, and a Note for OG Fans

Newcomers, don’t hold back too much.

• Catching up isn’t an obligation. Sharing your reactions with your current energy pleases the fandom more than going quiet because “I can’t talk until I’ve seen everything”
• If you ask about an unfamiliar term or past context, there is always an OG fan eager to explain
• If someone pulls rank by calling you “niwaka,” the best response is to keep your distance rather than compete. Muting is legitimate self-defense

OG fans, make your knowledge a bridge.

• A barrage of corrections and additions no one asked for tends to turn you into a know-it-all, however kind the intent
• “It was better back then” is the classic line that takes away a newcomer’s fun. Reminisce with fellow OG fans, and everyone stays in peace
• Don’t expose or laugh at a newcomer’s misunderstandings or fresh reactions. That damages the entrance to the fandom

Common Misunderstandings

• Length of fandom does not equal depth of love — The passion of someone who fell in yesterday can easily outrun a ten-year veteran
• OG fans aren’t better, either — Memories from watching for a long time are a treasure, but they are no basis for lording it over newcomers
• Welcoming newcomers doesn’t mean disrespecting OG fans — The two aren’t rivals; they split the work of holding the fandom’s past and future

The “-chu” Types to Watch For

Among the words for standing are some that describe behavior gone too far.

• Resu-chu (レス厨) — Someone who demands too much response from their oshi
• Ninchi-chu (認知厨) — Someone who pushes too hard to be recognized
• Ikiri (イキリ) — Showing off knowledge or OG status without reading the room
• Tanhanter (他担狩り, “hunting other fans”) — A member winning over even the fans of other members to become their own fans

The difficult part is that these people are often “just enthusiastic.” The dividing line is not how much passion someone has, but whether they are taking away the enjoyment of the people around them.

Over-eager fansThe line is impact on others

• Resu-chuDemands responses from the oshi
• Ninchi-chuPushes hard to be recognized
• IkiriShows off knowledge or OG status
• TanhanterA member wins over even other members' fans to become their own fans

The dividing line is whether the people around you can still enjoy themselves.

Notes From The Oshi Lab: An Entrance for Newcomers, the Next Chapter for OG Fans

The relationship between OG fans and newcomers is the single most important variable in how long a fan community lives. A fandom that is hard to enter always shrinks, and only fandoms with a welcoming atmosphere keep growing. What operators can do is prepare official on-ramps for newcomers (roundups, beginner guides) and not leave “welcoming newcomers” to the goodwill of OG fans. At the same time, mechanisms that shine a light on OG fans’ contributions are essential, such as sharing memories in anniversary projects and words of thanks to long-time fans. If you only build the newcomer path, OG fans feel “our story has been left behind” and quietly drift away. An entrance for newcomers, the next chapter for OG fans. Only communities with both wheels keep living through generational change after generational change.

Related Terms

Kaiwai / Ninchi / Fukyo / Ota-tomo