1948
- Established Nippoh Kohatsu Co., Ltd. (capitalized at 2 million yen)
Head Office: Gofukubashi, Chuo-ku, Tokyo (currently Yaesu)
Factories:
Otaki Factory – Shinmachi Kanaya, Otaki-machi, Isumi-gun, Chiba
Chimachi Factory – Matsumaru, Sencho-mura, Isumi-gun, Chiba - Started production of iodine
1955
- Became affiliated with Nippon Shokubai Kagaku Kogyo Co., Ltd. (currently Nippon Shokubai Co., Ltd.)
1957
- Established synthesis technology for hydrocyanic acid (hydrogen cyanide) and started its production
Established a foothold in cyanide derivatives through natural gas
1961
- Started production of methyl orthoformate, a pharmaceutical raw material
Aimed to effectively use cyanide derivatives and cultivate demand
1966
- Started production of the methyl bromide fumigant “Bromomethyl”
Laid the foundation for today’s range of bromine compounds
1967
- Company renamed Nippoh Chemicals Co., Ltd.
1971
- Started iodine production using the blowout method
1973
- Increased capital to 100 million yen
1978
- Started production of methyl orthoacetate, an agrochemical raw material
Achieved commercial production and sales within five months of receiving the manufacturing request
1979
- Moved the head office to Nihonbashi-Muromachi, Chuo-ku, Tokyo
1980
- Constructed the first multipurpose manufacturing facility
1990
- Increased capital to 517.2 million yen
- Established Nippo Kosan Co., Ltd. (wholly-owned subsidiary)
1993
- Constructed an iodine recovery facility
1995
- Constructed an iodine compound production facility
- Started production of the polymerization initiators 4,4′-Azobis(4-cyanovaleric acid) and 2,2′-Azobis(2-amidinopropane) dihydrochloride
Succeeded in further expansion of cyanide derivatives
1997
- Constructed a cyanide derivative plant
- Constructed a cyanide wastewater treatment plant
1998
- Celebrated the 50th anniversary of the founding
2001
- Obtained ISO 9001:2000 certification
2003
- Constructed a gas turbine cogeneration system
2007
- Obtained ISO 14001:2004 certification
2009
- Completed the Ogiwara Base I (8 wells)
2010
- Started production of the iodinating agent 1,3-Diiodo-5,5-dimethylhydantoin
2013
- Moved the head office to Nihonbashi-Honcho, Chuo-ku, Tokyo
2014
- Replaced the blowout tower
2016
- Completed the Mangi Base (6 wells)
2018
- Joined CIRIC (Chiba Iodine Resource Innovation Center)
2026
- Constructed the office building at the Chimachi Factory
- Completed Ogiwara Base II (8 wells planned)
