- April 1983
- Researched Preparation of biological thin-film samples for laser ionization microprobe mass spectrometry (analyzer was QP).
- October 1984
- Energetically worked on two projects: the development of a prototype laser ionization time- of-flight mass spectrometer and data acquiring for organic substances in mass spectrometry. Also, established method for preparing samples.
- May 1986
- Transferred to R&D Department of the Scientific Equipment Division where he made full use of the fundamental research results obtained at the Central Research Laboratory to develop an actual working product of the laser ionization time-of-flight mass spectrometer.
- May 1987
- Announced research results for the first time concerning soft ionization method with a mass detection number exceeding 48,000 at the Mass Spectrometry Society of Japan.
- September 1987
- Further research produced findings, including measuring data with a mass number of 72,000, which were presented in an English poster-arranged presentation at the 2nd Japan-China Joint Symposium on Mass Spectrometry.
- January 1988
-
Shimadzu laser ionization mass spectrometer LAMS-50K released. 
LAMS-50K - May 1989
- Received encouragement award from the Mass Spectrometry Society of Japan.
Research in laser ionization time-of-flight mass spectrometry to make possible detection of high-mass molecular ions (Koichi Tanaka & Yoshikazu Yoshida). - June 1990
- Installed LAMS-50K and supervised analysis work at City of Hope Medical Center, California, USA.
- August 1991
- Sales launch of Shimadzu gas chromatograph mass spectrometer GCMS-QP1100EX (high-sensitivity ion detection unit developed by Koichi Tanaka).
- 1992
-
Seconded to Kratos in the UK from January to December. Engaged in development of new mass spectrometer MALDI- TOF/MS "Kompact MALDI Series." Engaged in application technology research related to MALDI-TOF/MS after returning back to Shimadzu Japan. 
Kompact MALDI Series - March 1997
- Posted to newly established Shimadzu Research Laboratory in Europe (UK). Engaged in basic research for mass spectrometry.
- June 1999
- Succeeded in making the world's first practical use of hyphenated composite system comprising laser ionization time-of-flight mass spectrometer and quadrupole ion trap (QIT). Announced results to the American Society for Mass Spectrometry.
- December 1999
- Seconded to Kratos (UK) to work on product development.
- May 2002
- Returned to Japan and joined the Life Science Business Unit of Analytical Instrument Division.
- June 2002
-
Laser ionization quadrupole ion trap time-of-flight mass spectrometer "AX IMA-QIT" announced and launched for sale. 
AXIMA-QIT