C108 Venue Layout: This Year's Hall Changes at Tokyo Big Sight

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C108 (August 15–16, 2026) uses a noticeably different floor plan than past Comikets, because a chunk of Tokyo Big Sight is temporarily unavailable. Here's exactly what's changed and where things actually are this time.

Why the Layout Changed: East Halls 4–6 Are Closed

Tokyo Big Sight's East Halls 4–6 are closed for construction for this event, removing a significant chunk of the venue's usual floor space. Comiket's organizers rearranged circle and corporate booth assignments around the halls that remain available, which means returning attendees relying on a past visit's mental map should expect real differences this time, not just minor shuffling.

Where Everything Is for C108

Circles are assigned across East Halls 1–3, West Halls 1–2, and South Halls 1–2 — a wider spread across more of the venue's remaining halls than in years when East 4–6 was available. Corporate booths are located in West Halls 3–4 and South Halls 3–4, keeping official merchandise sales in a distinct section from the circle halls. The cosplay area uses the East Hall 8 indoor space along with rooftop space, separate from both circle and corporate areas.

One planning implication worth noting: with circles spread across three separate hall groups instead of a more consolidated layout, budgeting extra time to walk between them — especially if you're chasing specific circles in different halls — is more important for C108 than it might have been in a more typical year. It's also worth knowing this arrangement is specific to C108: the next event, C109 in December 2026, may use a different layout depending on hall availability and circle application numbers at that time.

What To Know

For anyone who's attended a past Comiket at Tokyo Big Sight, or is trying to plan their day using an old mental map, this year's hall closures mean the layout genuinely isn't the same as before — knowing exactly what moved where before you arrive saves real confusion once you're on the show floor.

Tokyo Big Sight is a working convention center that periodically closes sections for renovation, and Comiket's organizers adapt each event's hall assignments around whatever's actually available — this kind of 'the floor plan changes based on what's open this time' situation is a real, recurring part of attending large-scale Japanese conventions at shared venues, not a one-off Comiket quirk.

What Fans Are Saying

• "Good thing I checked the layout first — my usual route from past events doesn't work this time."
• "Circles being split across three hall groups is going to mean a lot more walking."
• "Curious whether C109 goes back to the old layout or keeps changing."

Original Japanese

• 「事前に配置を確認しておいてよかった。いつものルートが今回は通用しない」
• 「サークルが3つのホール群に分かれてるから、歩く距離が増えそう」
• 「C109で元の配置に戻るのか、また変わるのか気になる」

Easy Japanese

東京ビッグサイトの東4〜6ホールが工事のため使えないため、C108の会場配置はいつもと違います。サークル、企業ブース、コスプレエリアの場所を紹介します。