BDR researchers coming from diverse research fields are working together to achieve higher goals.

Seminars & Symposia

Seminars & Symposia

BDR hosts annual symposium and regular seminars inviting international scientists in life science.

Careers & Study

Careers & Study

BDR embraces people from diverse backgrounds, and strives to create an open and supportive setting for research.



BDR communicates the appeal and significance of our research to society through the use of various media and activities.



From research, events, people and everything in between, find out what’s going on at RIKEN BDR.

About Us

About Us

Exploring the scientific foundations of life through interdisciplinary approaches to address society’s problems.

Photo of Team leder, Kenta Sumiyama

Team Leader
Kenta Sumiyama Ph.D.

Laboratory for Mouse Genetic Engineering

[Closed Sep. 2023]

Studying genomic regulatory mechanisms and evolution with original genetic engineering techniques.

We are developing new techniques in mouse genetic engineering including direct genome editing on fertilized eggs of mice and microdevice-based easy and precise aggregation methods to obtain complete ES cell derived chimeric mice. By using these tools such as Triple CRISPR or Tol2 transgenesis, we are producing various useful genetically engineered mice within a short period of time. We are also studying cis-regulatory mechanisms in non-coding regions by using both molecular evolutionary analysis and genome editing technology to elucidate developmental and evolutionary mechanisms of mammals. Our recent achievement is the triple CRISPR gene knockout method, enabling 100% knockout of first generation mice. By using this method, phenotypic analysis can be done within three months without further crossing and breeding.

Microinjection into a mouse fertilized egg

Research Theme

  • Developing new techniques in highly efficient direct genome editing on fertilized eggs of mice
  • Developing new transgenesis techniques on fertilized eggs of mice
  • Study of cis-regulatory function in non-coding region of the mammalian genome
  • Study of evolutionary mechanisms for acquiring novel function

Selected Publications

Sumiyama K, Matsumoto N, Garçon-Yoshida J, et al.
Easy and efficient production of completely embryonic-stem-cell-derived mice using a micro-aggregation device.
PloS one 13(9), e0203056 (2018) doi: 10.1371/journal.pone.0203056

Tatsuki F, Sunagawa GA, Shi S, et al.
Involvement of Ca2+-Dependent Hyperpolarization in Sleep Duration in Mammals.
Neuron 90(1), 70-85 (2016) doi: 10.1016/j.neuron.2016.02.032

Sunagawa GA, Sumiyama K, Ukai-Tadenuma M, et al.
Mammalian Reverse Genetics without Crossing Reveals Nr3a as a Short-Sleeper Gene.
Cell Reports 14(3), 662-677 (2016) doi: 10.1016/j.celrep.2015.12.052

Noguchi M, Sumiyama K, Morimoto M.
Directed Migration of Pulmonary Neuroendocrine Cells toward Airway Branches Organizes the Stereotypic Location of Neuroepithelial Bodies.
Cell Reports 13(12), 2679-2686 (2015) doi: 10.1016/j.celrep.2015.11.058

Goto A, Nakahara I, Yamaguchi T, et al.
Circuit-dependent striatal PKA and ERK signaling underlies rapid behavioral shift in mating reaction of male mice.
Proceedings Of The National Academy Of Sciences Of The United States Of America 112(21), 6718-6723 (2015) doi: 10.1073/pnas.1507121112

Amemiya CT, Alfoldi J, Lee AP, et al.
The African coelacanth genome provides insights into tetrapod evolution.
Nature 496(7445), 311-316 (2013) doi: 10.1038/nature12027

Sumiyama K, Miyake T, Grimwood J, et al.
Theria-Specific Homeodomain and cis-Regulatory Element Evolution of the Dlx3-4 Bigene Cluster in 12 Different Mammalian Species.
Journal of Experimental Zoology Part B-Molecular and Developmental Evolution 318(8), 639-650 (2012) doi: 10.1002/jez.b.22469

Kamioka Y, Sumiyama K, Mizuno R, et al.
Live Imaging of Protein Kinase Activities in Transgenic Mice Expressing FRET Biosensors.
Cell Structure and Function 37(1), 65-73 (2012)

Sumiyama K, Kawakami K, Yagita K.
A simple and highly efficient transgenesis method in mice with the Tol2 transposon system and cytoplasmic microinjection.
Genomics 95(5), 306-311 (2010) doi: 10.1016/j.ygeno.2010.02.006

Sumiyama K, Ruddle FH.
Regulation of Dlx3 gene expression in visceral arches by evolutionarily conserved enhancer elements.
Proceedings of the National Academy of Sciences of the United States of America 100(7), 4030-4034 (2003) doi: 10.1073/pnas.0530119100

Sumiyama K, Irvine SQ, Stock DW, et al.
Genomic structure and functional control of the Dlx3-7 bigene cluster.
Proceedings of the National Academy of Sciences of the United States of America 99(2), 780-785 (2002) doi: 10.1073/pnas.012584999