Next Generation Scientist’s meeting (Dynamic reproductive lifespan) was held at Kumamoto Univ. on Jan. 13th. The following members gave presentations. *Oral Presentation* Satoshi FUNAYA: Involvement of H3 variants in reprogramming abnormalities of cloned embryos You HYEONGJU: Disruption of early embryonic development in mice by polymethylmethacrylate nanoplastics in an oxidative stress mechanism *Poster Presentation* Satoshi FUNAYA: Involvement of H3 variants in reprogramming abnormalities of cloned embryos You HYEONGJU: Disruption of early embryonic development in mice by polymethylmethacrylate nanoplastics in an oxidative stress mechanism *Short Talk* Yusuke SENDA

The Global Young Scientists Summit (GYSS) 2026 was held in Singapore, organized by the National Research Foundation, Singapore (NRF) on Jan. 5th-9th. Mr. Pham Dinh Quoc from our lab participated. Theme “Excite, Engage, Enable”

The 4th RIKEN Experimental Animal Network Meeting was held at RIKEN Center for Brain Science (Wako, Saitama) on Dec. 9th. Dr. Kimiko INOUE gave the group presentation in Session 2.

The 48th Annual Meeting of the Molecular Biology Society of Japan (MBSJ 2025) was held at Pacifico Yokohama (Yokohama, Kanagawa) on Dec. 3-5. Dr. Kohtaro MORITA gave a poster presentation. *Poster Presentation* Kohtaro MORITA: Development of a rat sperm cryopreservation and IVF method using a chemically defined preservation solution

The 11th Laboratory Animal Technology Research Exchange Conference of JAEAT(Japan Association for Experimental Animal Technologists) Ouu and Tohoku Branch was held at the Institute of Development, Aging and Cancer, Tohoku Univ. (Sendai, Miyagi) on Nov. 29th. Mr. Keiji MOCHIDA from our lab gave an educational lecture. Educational Lecture I: Freezing methods for mouse sperm in emergency situations

The 66th Lectures of TALAS(Tsukuba Association for Laboratory Animal Science) was held at the Tsukuba International Congress Center (Tsukuba, Ibaraki) on Nov. 28th. Theme: Approaches to Early Development and Implantation ~Reconstructing the “Original Form” with Stem Cells~ *Poster Presentation* Narumi OGONUKI: Offspring from mouse model of non-obstructive azoospermia with primary spermatocyte injection Michiko HIROSE: Establishment of embryonic stem cells from wild-derived strains of mice

The 35th Molossinus Colloquium was held at Tokyo Metropolitan Institute of Medical Science on Nov. 25-26. Ms. Ayumi HASEGAWA won the Moriwaki Kazuo Award 2025 at the 35th Molossinus Colloquium. “Development of assisted reproductive technologies for wild-derived mice” The following two members gave presentations. *Oral Presentation* Fumio IKE: Genome Analysis of Filobacterium rodentium Günther Strain *Poster Presentation* Keiji MOCHIDA: Efforts to establish a frozen gamete panel including wild-derived strains useful for polymorphism analysis.