| 1616 : |
It is said that white pottery stone was discovered by Ri Sanpei in Arita Izumiyama and made porcelain first in Japan. |
| 1689 : |
Matasiro Fukagawa ( founder Eizaemon Fukagawa ) started to manufacture pottery in Arita. |
| 1870 : |
By the command of the Ministry of telegraphic communication, the 8th Eizaemon Fukagawa succeeded in manufacture of the insulator for telegraphic communication first in Japan. |
| 1875 : |
Established the organization of "Koransha" by the 8th Eizaemon Fukagawa and some companion. |
| 1876 : |
Won the certificate of merit in the Philadelphia exposition. |
| 1877 : |
Presented "Chapter of honor" by Sir Toshimiti Ookubo.
Exhibited a low-pressure insulator made of porcelain in the first time domestic encouragement of industry exposition. and acquired the "Certificate of merit". |
| 1878 : |
Won the gold prize in Paris Exposition. |
| 1879 : |
The 8th Eizaemon Fukagawa established Koran unlimited partnership. The capital was 25,000 yen. |
| 1888 : |
Won the gold medal in the Barcelona exposition. |
| 1889 : |
The 9th Eizaemon Fukagawa assumed the position of the president. |
| 1896 : |
Appointed to supply pottery by the Imperial Household Ministry.
Held the pottery show in the Keiunzi temple. This is the start of present Arita porcelain festival. |
| 1900 : |
Won the gold prize in Paris Exposition. |
| 1908 : |
Constructed the "Touraku style" large kiln by the instruction of the Ministry of Agriculture and commerce. |
| 1909 : |
Won the grand prize in the Alaska Yukon Pacific Ocean exposition. |
| 1910 : |
Won the grand prize in the Japanese-English exposition. |
| 1913 : |
Manufactured a hard and high-pressure insulator, and delivered to Tokyo Shibaura Engineering Works etc. |
| 1914 : |
The capital was increased to 50,000 yen. |
| 1915 : |
Won the grand prize in the Panama Pacific Ocean exposition. |
| 1918 : |
The capital was increased to 200,000 yen. |
| 1928 : |
Produced ten-inch suspensible insulator, and delivered to the Tokyo railway bureau. |
| 1930 : |
Won the Grand prix in the Liege exposition. |
| 1935 : |
The 10th Eizaemon Fukagawa assumed the position of the president. |
| 1937 : |
Completed the sulfuretted iron removal equipment by the method of dressing up the floatag. Delivered the industrial research bounty by the commerce and industry ministry. |
| 1941 : |
Established the Koran insulator sales Ltd. (capital 180,000 yen) and Koransha pottery sales Ltd. (capital 180,000 yen). |
| 1949 : |
The capital was increased to 3,000,000 yen in March.
The capital was increased to 6,000,000 yen in June.
The Emperor Showa visited to Koransha. |
| 1952 : |
Became the insulator factory JIS(Japan Industrial Standards) display permission factory. |
| 1958 : |
The capital was increased to 9,000,000 yen. |
| 1959 : |
Constructed the crude petroleum tunnel kiln for the insulator burning. |
| 1960 : |
Moritake Fukagawa assumed the position of the president of the Koran unlimited partnership and the Koran insulator sales Ltd. |
| 1961 : |
The Emperor and Empress Showa visited to Koransha.
Executed a great equipment modernization of the insulator factory and restarted real insulator export until 1962. |
| 1967 : |
Established newly the Koransha Gifu factory. |
| 1969 : |
The Crown Prince (now Emperor) visited to Koransha. |
| 1970 : |
Changed the organization Koran unlimited partnership to Koransha Co., Ltd. The capital was 22,000,000 yen.
The president was Moritake Fukagawa.
Constructed the new ceramic factory in the insulator factory according to the development of an electronic industry. Started the production of the steatite porcelains. |
| 1972 : |
Developed the high purity alumina porcelain ( Gemran-purity 99.95%). |
| 1976 : |
Developed alumina porcelain protection tube for continuous measuring in blast furnace of steel. Selected to "Ten new product prize for 1976 year" by Nikkan Kogyo Shimbun. |
| 1977 : |
The capital was increased to 44,000,000 yen. |
| 1978 : |
Tadashi Fukagawa assumed the position of the president of Koransha Co., Ltd.
Moritake Fukagawa assumed the position of the chairman of Koransha Co., Ltd.
Developed the low thermal expansion ceramics (Ul-ceram). |
| 1979 : |
Celebrated 100 anniversary Koransha. |
| 1985 : |
Succeeded in the normal pressure sintering BN. |
| 1988 : |
Shinichi Fukagawa assumed the position of the president of Koransha Co., Ltd. |
| 1989 : |
Celebrated 300th anniversary from establishment.
Established newly the art porcelain factory in Akasaka. |
| 1990 : |
Established newly Koransha Akaemachi-atelier. |
| 1991 : |
Changed the Koran insulator sales Ltd. to Koransha Corporation Ltd. |
| 1996 : |
Held the world flame exposition in Arita.
Exhibited the electronic mechanism doll made of porcelain in the Arita district hall. |
| 1999 : |
Entrusted to the regional consortium research and development system from the Ministry of Economy, Trade and Industry by "Development of the energy conservation type processing technology of high purity and a transparent fused silica". |
| 2000 : |
Won the technological industrial Kyushu central prize by "High purity h-BN complex material by the normal pressure sintering and the practical use". |
| 2001 : |
Won the director general of Patent Office prize from the Ministry of Economy, Trade and Industry. |
| 2002 : |
Started to sell a fused silica product "Reflector for the liquid crystal projector".
Acquired the International Standard "ISO9001" of the quality management in October. |
| 2004 : |
The capital was increased to 98,000,000 yen in February.
Celebrated the 125th anniversary of Koransha establishment on July 10th. |
| 2006 : |
Shinichi Fukagawa assumed the position of the chairman of Koransha Co., Ltd.
Noriyuki Fukagawa assumed the position of the president of Koransha Co., Ltd. |
| 2007 : |
Amalgamated Koransha Co., Ltd. and five related companies (Koransha Corporation Ltd., Koransha pottery sales Ltd., Koransha Tougei Ltd., Koransha Akaemachi-atelier Ltd. and Koran building Ltd.) in January. |
| 2008 : |
Opened renewedly the Arita showroom in August after a great repair. |
| 2009 : |
Celebrated the 130th anniversary of Koransha establishment on July. |
