[1] In 1979, he became responsible for IMO safety planning regulations at the Ministry of Transport Ship Bureau.

[2] In July 2012, in response to the Costa Concordia disaster, he stated that the IMO needed to seriously consider the lessons to be learnt [from the accident] and, if necessary, re-reexamine the requirements on the safety of large passenger ships.

[4] In September 2012, he argued for enhanced safety regulations for passenger shipping in the maritime industry.

[5] In June 2013, in Oslo, he advised audiences of the IMO development of the Polar Code.

[1][10] On his retirement from the IMO at the end of 2015, he was the last Japanese official to lead a UN specialised agency until the appointment of Masahiko Metoki to the Universal Postal Union in 2022.