The 64th Annual Meeting of Japanese Society for Ova Research (JSOR) was held at the Tsukuba International Congress Center (Tsukuba, Ibaraki) on May 20-21. On-demand distribution was also available from May 31 (Wed.) – June 7 (Wed.). *Symposium 1 “Gametes that Weave Life: Knowing, Making, and Using”* Atsuo OGURA: Development of ICSI techniques in laboratory animals – Focusing on the latest results *Poster Session* Keiji MOCHIDA: Increase in litter size in mice and rats by administration of anti-inhibin monoclonal antibody

Advisory Committee members visited our laboratory as part of the 8th BRC Advisory Council Laboratory Tour.

The International Year of Basic Sciences for Sustainable Development SRD (The Society for Reproduction and Development) General Public Symposium was held online on May 13. Ms. Narumi OGONUKI gave a lecture. Title: Will a baby be born from a germ cell before sperm?

A delegation from the National University of Vietnam, Ho Chi Minh City (VNUHCM), visited RIKEN BioResource Research Center (BRC) and toured our laboratory. We were also delighted to see our old friend, Dr. Thuan, a former researcher at RIKEN CDB. The purpose of this visit is to see the facilities of the host laboratory of a IPA student coming from VNUHCM this June. It is expected that the Vietnamese students will continue to come to BRC.

36th International Mammalian Genome Conference (IMGC2023) was held at Epochal Tsukuba International Congress Center (Ibaraki, Japan) and online hybrid on 28-31 March. IMGC2023 Twitter *RIKEN Symposium ”Developmental Epigenetics” Invited Lecture* Atsuo Ogura: Nuclear transfer for the study of the developmental epigenetics *Poster Session* Dr. Kimiko INOUE: Elucidation of imprinted genes responsible for hyperplasia in somatic cell nuclear transferred (SCNT) placentas Narumi OGONUKI: Fertilization using spermatocytes overcomes azoospermia caused by meiotic arrest Michiko HIROSE: Generation of knockout hamsters as a new experimental model strategy Dr. Daiki SHIKATA: Suppression of enhancer-like endogenous retrovirus in mouse somatic cell nuclear transfer embryos Naomi WATANABE: Preservation of wild-derived mouse strains using nuclear transfer technology

Prof. HONDA, Jichi Medical University, visited our laboratory to observe and practice embryo freezing and thawing. He enthusiastically listened to Ms. Hasegawa’s explanation, observed the practical skills, and confirmed the key points.

The 3rd meeting for the Study of Sexual Reproduction “Reproductive Diversity” was held on March 10-11 at the RIKEN Center for Biosystems Dynamics Research in Kobe, Japan. Dr. Shogo MATOBA gave an invited lecture titled “Somatic Cell Nuclear Transfer Cloning: A Bypass of Sexual Reproduction.”

The 26th Interdisciplinary Exchange Evening was held onsite (Wako Branch, RIKEN) and online hybrid on February 17th. The meeting was organized by RIKEN Scientists’ Assembly Steering Committee. *Poster Session* Dr. Kimiko INOUE: Establishment of a mono-allelic genome editing system and analysis of functionally unknown imprinted genes Dr. Aya UCHIDA: Comparative analysis of mouse trophoblast stem cells derived by somatic cell nuclear transfer and in vitro fertilization

The mini symposium “Genome building from TADs” was held onsite (The Tsukuba Center for Institutes, Japan) and online hybrid.