Shachihata Turns Crowdfunding To VTuber Penlights That React To Stream Audio
Shachihata is pushing a stamp-technology watermark into fan goods that work off a stream's audio, which gives at-home viewers a live-style light response without a Bluetooth connection.
Reporting from 1 source: KAI-YOU.
Shachihata, the company known for hanko stamps, opened a CAMPFIRE crowdfunding campaign on Tuesday, October 20 for penlights and acrylic stands that light up in response to VTuber songs using its Oto no Shirushi audio watermarking technology. The project covers 26 VTubers and runs until Monday, November 30. Goods read inaudible staging data embedded in the music, so they respond during livestreams and archived videos at home without Bluetooth or other wireless control.
Oto no Shirushi embeds staging instructions in music as an inaudible audio watermark. A compatible penlight or acrylic stand picks the signal up from whatever device is playing the song, whether a smartphone, PC or speaker. The goods light in sync with the track, so the same behavior works at a venue, on a YouTube livestream, or in a later archive.
Shachihata lists reward tiers from a 1,100-yen support plan to a 14,300-yen full set of penlight and stand, with a 55,000-yen plan to put the technology into a VTuber's own songs. Rewards are scheduled to ship from December 2026 into around January 2027.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.