Tohoku Mathematical Journal

Tohoku Mathematical Journal is published by Tohoku University, Mathematical Institute and is in Zone 4 of Mathematics in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Geometric Analysis and Curvature Flows, Algebraic Geometry and Number Theory and Geometry and complex manifolds, together about 26.8% of its articles. Its main subfields are Geometry and Topology and Applied Mathematics. (generated from OpenAlex topic counts and CAS ranking data)

The Tohoku Mathematical Journal was started in July 1911, one month prior to the first lecture at the College of Science, after a period of preparation that began with the foundation of Tohoku Imperial University on June 22, 1907. Professor Tsuruichi HAYASHI, who with Professor Matsusaburo FUJIWARA was one of the founding professors of the Mathematical Institute of the College of Science, provided his own private funds for the publication of the journal. Among the first generation of faculty members at the College of Science, Professor Fujiwara, Assistant Professor Tadahiko KUBOTA, Assistant Kinnosuke OGURA and Physics Professor Jun ISHIHARA cooperated with Professor Hayashi in editing the journal. As Professor Fujiwara later commented in the Obituary Note for Professor Hayashi published in Tohoku Math. J., First Series, Vol. 41, (1935-1936), pp.265-289, " To found a new journal, periodically issued, in such a time, was a very bold enterprise. His foresight and audacity only could do this. The publication of the Tôhoku Mathematical Journal marked a striking epoch in the history of mathematics in Japan." From the start, the journal was a truly international research journal accepting qualified original articles written in Japanese, English, German, French, or Italian from throughout the world. The financial burden on Professor Hayashi must have been considerable. President Masataro SAWAYANAGI of the Tohoku Imperial University tried to alleviate this burden by arranging for the university to purchase copies which were then donated to other universities and learned societies throughout the world. On the advice of the Board of Audit of the Japanese Government, the management of the journal was transferred to the university, although Professor Hayashi continued to serve as Chief-Editor until the end of his life. Due to the Second World War, the publication of the journal had to be suspended, and Volume 49 in 1943 was the last issue in the First Series. After the war the publication of the journal was resumed, and Volume 1 in the Second Series was published in 1949. In the Second Series, only original research articles written in English, German or French are accepted, whereas the First Series contained review articles as well as articles written in Japanese on traditional Japanese mathematics ("wazan", sometimes pronounced "wasan"). Publication of the First Series was somewhat irregular, but on average two volumes were published each year. In the Second Series,

From the journal's Aims & Scope

Research area (LetPub): Mathematics

CAS Journal Ranking

Database indexing

SCIEScopusLetPub

International journal early-warning lists: not listed in any editionLetPub

Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.

Impact

Impact factor

0.53LetPub · 2026-09-13

CiteScore 2026-06

0.9LetPub · 2026-09-13

SJR 2026-06

0.29LetPub · 2026-09-13

SNIP 2026-06

0.84LetPub · 2026-09-13

h-index

27LetPub · 2026-09-13

h-index

84OpenAlex · 2026-10-01

i10-index

1,036OpenAlex · 2026-10-01

2-year mean citedness

0.59OpenAlex · 2026-10-01

Self-citation rate

0%LetPub · 2026-09-13

Share of gold OA articles

0%LetPub · 2026-09-13

Volume

Articles per year

25LetPub · 2026-09-13

Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.

Average review time (community reports)

over 12 weeksLetPub · 2026-09-13

Average acceptance (community reports)

EasyLetPub · 2026-09-13

Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.

Other charges and waivers (author guidelines)

Page charges

Charged; see the journal's website for the amount

Submission fee

No submission fee

The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.

Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.

Publisher

Tohoku University, Mathematical Institute

Country or region

JAPAN

Language

Multi-Language

Frequency

Quarterly

ISSN

0040-8735

Official links

• Journal homepage ↗OpenAlex
• Submission system ↗LetPub