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It's an event similar to Comiket, and just like Comiket it took place at Tokyo Big Sight.
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It's a smaller event, so I got a better place in the queue than at Comiket.
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Still plenty of people though.
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The Comic1 catalog was also the ticket, so you just held it up at the entrance to show that you had one.
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Since it was a smaller event it only used the west halls and none of the east halls.
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Both west hall 1 and 2 had circles selling doujins and goods.
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This is inside west hall 2.
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In west hall 4 they had a separate event called Character1 with corporate booths.
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In the Character1 area they had this big Nekopara TV anime ad.
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And some smaller ads for various other anime, figures and other stuff.
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Cardboard cutouts.
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Metallizing Art on display.
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At the Key booth they also had art.
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One of Kanade Tachibana from Angel Beats.
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They had a stamp rally at the Key booth for people who bought items too.
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In a corner of Character1 they had itasha on display.
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Lots of different cars including this Kin'iro Loveriche one.
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Ryo Matsunaga from Idolmaster car.
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minori car with Ef: A Fairy Tale of the Two characters on the bonnet.
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Cardcaptor Sakura.
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This Magical Girl Lyrical Nanoha car had giant plushies in the seats.
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Cure Gelato from KiraKira Pretty Cure A La Mode.
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Kaori Nakaseko from Sound! Euphonium.
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I even saw an itasha truck here.
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Back of the truck.
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There were a few cosplayers around too.
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Including this official cosplayer for a mobile game called Black Stella.
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Cosplayer and matching itasha of Orifushi Mafuyu from Kanojo × Kanojo × Kanojo.
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A lot less people at the end of the day.
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Before I left I spotted these Comic1 15 themed shikishi sign boards.
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Closer look of more shikishi.
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Here's a picture of the Comic1 15 catalog in the bottom left and some of the stuff I got.
No location map since it's no longer there.
This location was visited on 2019/04/29.
Links:
Comic1 official website
Character1 official website