Hikari Ltd

Hikari Ltd is a publisher of journals and books in science, technology, medicine and economics founded in 2005, with editions covering a wide range of disciplines.

Hikari journals are archived digitally in Portico - a digital preservation service whose mission is to preserve scholarly literature and to ensure long-term access to electronic archives. Hikari is a member of Publishers International Linking Association (Crossref) and databases of scholarly works maintained by Scilit (MDPI), Dimensions, ScienceGate, etc.

Featured articles:
▸   Roberto C. Reyes Carranza
      Solution to 9 notable problems and expansion of the theory of highly nonlinear functions
      International Journal of Algebra, Vol. 19, 2025, no. 3, 89-206
▸   Yalong Wang, Xianming Shi, Mifen Yang, Penghua Liu, Cenyu Hu, Chao Chang
      A methodological investigation of physics-informed neural networks for multi-mechanism coupled damage effectiveness prediction
      Advances in Theoretical and Applied Mechanics, Vol. 14, 2025, no. 1, 1-18
▸   Janis Kuzmanis
      On the origin of abc-triples
      International Journal of Algebra, Vol. 19, 2025, no. 1, 13-46
▸   Arkadiy Tsionskiy Mikhail Tsionskiy
      Existence, uniqueness and smoothness of a solution for 3D Navier-Stokes equations with any smooth initial velocity. A priori estimate of this solution
      International Journal of Mathematical Analysis, Vol. 19, 2025, no. 3, 117-149
▸   Tat Leung Yee
      A simple truncation approach for systematically constructing Lax pairs and Bäcklund transformations for integrable equations
      International Journal of Mathematical Analysis, Vol. 19, 2025, no. 4, 151-167

Dear authors, editors, and collaborators,

We would like to inform you of an upcoming adjustment to the publication fees for scientific articles in our publishing house. This decision has been made after careful consideration and is driven by the need to ensure the continued sustainability and quality of our scientific publishing activities.

Our current pricing has remained unchanged since 2011. Over the past years, however, the costs associated with the entire publishing process: editing, technical processing, digital dissemination, and infrastructure maintenance have increased significantly.

In particular, we have faced rising expenses in the following areas:
- Software licenses and digital publishing platforms;
- Professional editorial and technical processing services;
- Server infrastructure, digital security, and long-term archiving;
- Ensuring accessibility and compliance with international standards for scientific publishing ethics and open access.

To continue offering high-quality publishing services that meet the evolving needs of the scientific community, an update to our publication fees has become necessary. This adjustment will enable us to invest in improving our processes, adopting modern technologies, and increasing the visibility and impact of the research we publish.

We understand that any financial change requires transparency and justification. Therefore, we are committed to clearly communicating the details of the new pricing policy, which will take effect on December 1, 2025, namely:

▸ papers of 1-8 printed pages: 360 EUR per paper

▸ papers over 8 printed pages: 45 EUR per page

Thank you for your understanding, trust, and continued support in our shared mission to advance and disseminate scientific knowledge.

Sincerely,
Hikari Ltd
October 11, 2025