.ac.jp domains list

What is .ac.jp TLD

.ac.jp is the academic second-level domain within Japan’s .jp country‑code top‑level domain, designated for accredited higher‑education institutions, research bodies, and related academic organizations. The namespace operates under the .jp registry’s structured policy framework with eligibility verification and conservative issuance. In practice, .ac.jp domains signal institutional legitimacy and local compliance, while .ac.jp websites typically host official university information, research portals, and student services. From our live index, we track 3,696 active registrations, of which 2,891 are live and 2,891 resolve via DNS, indicating a high operational rate across 7 countries where the TLD appears in use. Recent activity is measured, with 1 new registrations last week, consistent with controlled admission criteria and seasonality. Explore current inventories, change signals, and ownership patterns in our datasets. Download .ac.jp domain datasets from webatla.

History and key features of .ac.jp TLD

.ac.jp originated in the early .jp hierarchy to separate academic entities from commercial and governmental sectors, providing a recognizable namespace for universities and research organizations. Key features include strict eligibility checks, organizational validation, and typically Japan‑based administrative contacts; taken together, these factors keep .ac.jp domains stable with low churn and long lifecycles. We observe measured growth: 4 in December 2025 and 1 additions illustrate episodic expansion aligned with academic calendars. Operationally, 2,891 resolving hosts and 2,891 active .ac.jp websites demonstrate consistent infrastructure and publishing cadence across 7 countries where the extension appears via hosting or collaborations. With 3,696 total registrations, the namespace shows maturity, predictability, and clear eligibility boundaries that aid analysis and benchmarking. For deeper insights, download .ac.jp domain datasets from webatla.

Why and who choose the .ac.jp domain

Organizations choose .ac.jp to foreground academic identity, trust, and discoverability in Japan, while international projects adopt it through partnerships or local entities when eligible. Universities, junior colleges, research institutes, and educational corporations use .ac.jp domains for admissions, research dissemination, governance notices, and alumni services; meanwhile, .ac.jp websites commonly host repositories, syllabi, faculty profiles, and lab pages. Decision drivers include alignment with regulatory expectations, consistent naming conventions, and well‑understood authority signals among domestic audiences. Evidence from our index shows 2,891 live sites from 3,696 registrations, with 7 countries represented through hosting, subsidiaries, or collaborations; incremental growth of 4 in December 2025 and 1 indicates curated expansion rather than open‑ended proliferation. We help map institutional networks, monitor activity, and compare cohorts longitudinally. Researchers and analysts: download .ac.jp domain datasets from webatla.