Akihiro Tatematsu is a Principal Database Engineer for Rakuten Group. He joined Rakuten Group in 1010. He has experience managing relational databases, DC migration, and other projects as an Oracle DBA up until 2015. Since then, he has managed MongoDB, Redis, ElasticSearch, and Couchbase as a NoSQL DBA team leader. In 2019, he participted in MongoDB World and MondoDB.local Bengaluru as a speaker. In 2020, he was a speaker at Creationline Day as a speaker. In 2022, he worked as an instructor at the Nagaoka University of Technology.