Buppan
Buppan (物販) translates to “Sale of goods” (so not services) often on or around events. Generally there are 2 types, mae-buppan (前物販) which takes place before a show, and shuuengo buppan (終演後物販) which takes place after a show. This is where fans buy CDs, cheki tickets, photo sets and other goods directly from the group.
Center
The member placed in the main front position of a group or song lineup, usually the most visually emphasized performer. Some groups have a dedicated center idol, often the leader, but not all groups have that system. Mostly the center idol differs per song, but not always, it depends on the group. It can also occur that 1 idol unintentionally becomes the center just because she gets more lines than the rest.
Cheki
An instant photo, usually taken with an idol at an event and often signed afterward. You can often choose between a solo cheki where only a picture of the idol is taken, or a duo cheki where you both pose for the cheki. After taking the cheki you get a minute or 2 to chat with the idol. There are also online cheki events where the signing is livestreamed and the cheki is mailed to you. I recommend taking a cheki to anyone, it is a fun experience and the idols are genuinely pleasant people, but keep your Japanese ready!
Chekikai
A dedicated event or time slot for cheki sessions, sometimes held after a live and sometimes organized separately.
Chijo idol
Chijo idol (地上アイドル) or aboveground idols, are more mainstream idol groups. The term itself is not thrown around often, it is more a counterpart to chika idols. If underground idols exist that implies the existence of aboveground idols right? When thinking of mainstream idol groups, think of Fruit Zipper, CUTIE STREET and CANDY TUNE
Chika idol
Chika idol (地下アイドル) or Underground idol usually are idols and groups working in smaller venues and more independent scenes outside the biggest mainstream systems. What exactly makes an idol group underground is not set in stone. For example groups like BISH and AKB48 started as chika idols however they still made it big and don’t fit the stereotypical chika idol scene anymore.
DD
DD stands for Dare Demo Daisuki (誰でも大好き) meaning "I love everyone." It describes a fan who has no single oshi and enthusiastically supports many idols or groups simultaneously. The term is sometimes used affectionately, sometimes critically depending on the fan community. The opposite of a tan-oshi.
Furicopy
Furicopy (振りコピ) is the practice of copying the official dance choreography of a song during a live performance. Fans who furicopy learn the arm movements and dance steps from music videos or live footage and perform them alongside the idols at concerts. This is for the true dedicated fans and it truly is a sight to behold when seen in real life!
Goods
The general term for official merchandise such as photo sets, keychains, badges, towels, apparel, and other event items.
Gradol
Short for gravure idol. Gravure idols are models and media personalities associated with gravure photo shoots rather than standard idol group performance activity.
Graduation
The term used when an idol leaves a group, often framed as a milestone departure rather than an ordinary resignation. A graduation is often accompanied with an official graduation ceremony where the idol performs her final live show. Graduation notices get posted on social media, mostly on X, and start with the dreaded words “お知らせ” which means “announcement” this is the stuff of nightmares for any idol fans, because these words can announce mundane news like a delay of a liveshow or an idol falling ill for the day, or your oshi graduating or even the group disbanding. Horrible stuff.
Gravure
A style of Japanese glamour modeling centered on photo shoots, photobooks, and magazine spreads. It ranges from modest to explicit depending on the model and production. In idol culture it is relevant because some idols work in both spaces, performing in groups while also doing gravure work, and some transition fully into gravure after graduation. It is a legitimate part of the broader idol industry and worth understanding without attaching more weight to it than it deserves.
Hako-oshi
Hako-oshi (箱推し) means supporting an entire group rather than one specific member. A hako-oshi fan buys tickets and merchandise to support the group as a whole and has no single standout favorite. The term literally refers to the "box" (箱) of the group rather than an individual inside it.
Handshake Event
A handshake event (握手会, akushukai) is a fan meeting format where supporters line up to briefly shake hands and exchange a few words with their favorite idol or group members. Handshake events are closely associated with major idol groups like AKB48 and are often tied to CD purchase incentives. They serve as a direct point of contact between idol and fan.
Idol
A Japanese-style performer marketed through personality, image, fan connection, and live activities, either as a solo act or part of a group. What separates an idol from a regular pop artist is the emphasis on closeness with fans, you can meet them after a show, take a cheki, chat for a minute. They are not untouchable stars, they are performers you can actually interact with. Idol groups can range from massive mainstream acts performing in arenas to small independent groups performing in basement venues for a handful of dedicated fans. There is an idol for almost every taste imaginable.
Idolcore
A fan-used genre label for music that blends idol performance with heavier styles such as hardcore, metalcore, or loud rock.
Ita-bag
A bag covered with merch featuring a fan’s favorite idol or character, used to visibly show devotion in public. The term “Ita” comes from the Japanese word for “ouch” or pain “痛”, it does not mean that the bag is literally painful, it is more like the bag is seen as cringe. The otaku have retaken the “Ita” term and made it their own, other examples are “Ita-cars” which are cars wrapped with anime girls, which is actually really cool. Nothing to be ashamed of, you might be cringe but you are free. Of course, you don’t have to make ita-bags if you don’t want to.
Kaiwai
A scene, circle, or community surrounding a shared interest, such as a specific idol genre or fan culture.
Kami-oshi
Your absolute number one favorite; the oshi you support above all others.
Kawaiicore
A style label used for music or visuals that mix cute aesthetics with louder, darker, or more chaotic sounds and presentation.
Leader
The member officially designated as the group’s leader, usually with a visible role in introductions, coordination, or representing the group publicly.
Mix
A fixed chant performed by fans at certain points during a song, usually during instrumental sections or before the vocals kick in. The standard mix opens with "Yossha ikuzo!" followed by a rapid sequence of calls. Different groups have their own variations and some songs have member-specific mixes. Learning the mix for your oshi's songs is part of becoming a proper live audience member, when a crowd does it in sync it adds an energy to the show that you cannot get anywhere else.
One-man live
A concert headlined entirely by one group or artist, without the multi-group format common in idol event lineups.
Oricon
A major Japanese chart and entertainment ranking brand used to track sales, chart placements, and industry visibility.
Oshi
The idol, member, or group you support most strongly. Oshi comes from the verb osu (推す), meaning to push or recommend, your oshi is the one you would push to others as worth supporting. It goes beyond simply liking someone. An oshi is someone whose success you actively invest in, emotionally and often financially. You follow their updates, attend their lives, buy their releases. For many fans their oshi becomes a genuine source of motivation and comfort in daily life.
Oshi-hen
Changing your main oshi from one idol or member to another. Sometimes jokingly referred to as “cheating”, but it’s all in good fun.
Oshikatsu
The activities involved in actively supporting your oshi. Streaming their music, attending lives, buying merchandise, voting in campaigns, posting about them online, joining birthday projects, all of it counts as oshikatsu. It is less a hobby and more a lifestyle, something you build around the things that bring you joy. The term became mainstream in Japan in the late 2010s and has since spread well beyond idol fandom into anime, gaming, and general pop culture. For more information, read my oshikatsu guide for new idol fans
Oshimen
An older term for your favorite member, especially associated with large-group idol fandom.
Penlight
A handheld concert light used by fans to support a member or group, often in that member’s assigned color.
Pinchike
Slang for young or rule breaking fans, used critically within idol fan culture. Examples of pinchike are fans that try to climb up the stage, try to touch the idols, or ask for personal info of the idols. Other rule breaking behaviour is being a drunkard and bothering people, trying to start a moshpit when not allowed (some groups allow moshing). Don’t be a pinchike, behave yourself.
Senbatsu
Selected members chosen to participate in a specific single, lineup, or promotional unit.
Taiban
A live event where multiple groups perform on the same bill, common in underground and alternative idol scenes.
Tan-oshi
Supporting exactly one idol as your sole main favorite. This means all your oshikatsu activities are focused on 1 idol, and no one else, you only cheer for her, you only buy merch with her on it, you only line up for chekis with her. This is the exact opposite of DD.
Tōtoi
An expression used when something feels so precious, moving, or emotionally beautiful that it overwhelms you.
Two-man live
A concert featuring two main acts sharing the bill.
Uchiwa
An Uchiwa is a flat hand fan often used in oshikatsu show support for or gain attention of your oshi. The fan is often handmade and decorated with glitter, lace, and stickers. Fans also put pictures on the fan or write messages or requests for their oshi. Requests can include poses for pictures, like "wink" or "heart" or just actions like waving or pointing. While these fans are often handmade, official uchiwa do exist and can sometimes be bought as merch. Plain uchiwa can also be bought at 100-yen shops.
Wota
A term for a dedicated idol fan. It is short for “wotaku” which is a subculture of the “Otaku” culture which in Japan is used for someone who is super into a specific thing, like anime, games, trains, or in this case, idols. Wota is something I have personally never heard in Japanese, they often refer to themselves as Otaku, but I think this might differ per fanbase. Listen to what the Japanese people in the fanbase use and adapt.
Wotagei
A style of energetic fan performance done alongside the music at idol lives, involving fast arm movements, spinning, jumping, and choreographed call patterns. It developed in idol live culture as a way for fans to actively participate rather than just watch. Wotagei can look intense from the outside, because it is, but it is a genuine art form within the community. At underground and rock idol shows especially, a crowd doing wotagei properly is as much a part of the performance as the idols on stage.
