The “Next-Generation Developmental Bioengineering (NextDevBio)” Young Reserchers Workshop was held at Kamenoi Hotel (Beppu City, Oita Pref.) on June 15-17. Dr. Shogo MATOBA participated as a panelist, and Dr. Hyeong-Ju You gave a poster presentation. *Poster Presentation* Hyeong-Ju You: Structural and transcriptional heterogeneity in preimplantation SCNT embryos revealed by live imaging and single-embryo RNA sequencing

Dr. Takuya Sato and Mr. Koichi Uemura of Yokohama City Univ. visited our lab for an experiment of microinsemination.

Dr. Sayaka Wakayama and three students from the University of Yamanashi visited Tsukuba for training the cryopreservation technology.

The 36th Molossinus Colloquium was held at ASO Farm Land (Minamiaso Village, Aso District, Kumamoto) on Jun. 4-5. Theme: Let’s Talk About the Fascinating World of Biology and Genetics ★Oral Presentation★ Fumio IKE: Two CV Topics: Housing Environment, Genetics, and Physiology ★Poster Presentation★ Ayumi HASEGAWA: Production of offspring from frozen ovaries of JF1 strain

As part of the JST Fusion Oriented Research for disruptive Science and Technology(FOREST) Program, the 8th Ishizuka Panel Meeting was held in Umeda, Osaka. Dr. Shogo Matoba from our laboratory participated in the meeting and presented the latest progress of his project, “Protection of Embryogenesis by the Placenta and the Consequences of Its Disruption.”

The 72nd Annual Meeting for Japanese Association for Laboratory Animal Science (JALAS) was held at Okinawa Convention Center (Ginowan, Okinawa) on May 27-29. Theme: Achieving world-class animal welfare standards and spreading awareness to the world *Oral Presentation* Fumio IKE: Golden Hamster: Potential as a Microbiome Model *Poster Presentation* Kimiko INOUE: Spliceosome mis-activation observed in somatic cell nuclear transferred (SCNT) embryos Ayumi HASEGAWA: Evaluation of offspring production in wild-derived mice via ovarian transplantation Keiji MOCHIDA: Development of a protocol for the simplest method of vitrification of mouse embryos Kohtaro MORITA: An in vitro culture method for IVF embryos derived from zona-free oocytes and frozen–thawed sperm in inbred mice

Dr. Masashi Hada from the The University of Tokyo visited our lab for the JF1/Ms IVF training program.

Dr. Arata Honda from Jichi Medical University visited our laboratory for collaborative research using rat embryos.

The 182nd RIKEN BRC Seminar was held at the RIKEN BioResource Research Center, Moriwaki Kazuo Hall and Zoom hybrid. Dr. Takaya TOTSUKA The Laboratory of Chromosome Dynamics and Evolution, National Institute of Health (NIH) Title: Mechanic diversity in the egg spindle positioning across mammalian species

Dr. Takaya Totsuka (The Laboratory of Chromosome Dynamics and Evolution, NIH) visited our laboratory from April 14 to 24 for training in intracytoplasmic sperm injection using spermatocyte.