Teacup.com is a Japanese-language web platform operated by Tea Cup Communication, based in Shibuya-ku, Tokyo, that provides free rental bulletin boards (BBS/掲示板), blogs, and community tools. It serves Japanese internet users seeking no-cost hosted spaces for online discussion and community building. The site is described in its own metadata as one of the most widely used free BBS services in Japan.
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Authority
85/100
Safety
90/100
Registered
Mar 7, 2000
26 years old · GMO Internet Group, Inc. d/b/a Onamae.com
On record
since 2006
3 of 5 safety checks passed (Sep 4, 2026).
AboutUs has not vetted this site. 2 of 5 automated safety checks did not pass. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.
Current facts
What AboutUs observed on the live site and in WHOIS/DNS today. These are measurements, not an endorsement of the site.
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Domain registered Mar 7, 2000 — 26 years old.
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Registrar today: GMO Internet Group, Inc. d/b/a Onamae.com — unchanged since AboutUs began tracking (Jul 23, 2026).