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History
| 1936 | Yamamotogumi Fire-Proof Plant was established in Tokoname city,Aichi prefecture,and the production of fire-proof bricks began. |
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| 1939 | Yamamoto Fire-Proof Industry co. was established. |
| 1944 | The name was changed to Nippon Fire-Proof Industry co. |
| 1955 | Tunnel kiln was installed as a firing facility. The production of acid-proof porcelain and floor tiles began. |
| 1957 | Nittai tiles were supplied to Tokyo Marunouchi Building,one of the earliest,most famous tall buildings in Japan.Nittai tiles began to be known,and to be delivered to many places in large quantities. |
| 1964 | Nittai floor tiles were supplied to outdoor gymnasiums and other facilities related to the Tokyo Olympic. |
| 1967 | Oryu plant was founded.Exportation of Nittai tiles named “NITTAI EARTHEN”to the U.S.,Canada,and Australia began. |
| 1969 | Nittai porcelain tiles and floor tiles were supplied in large quantities for the construction of exhibition halls for the Osaka International Exhibition Fair. |
| 1970 | The name was changed to Nittai-Kogyo.co.,ltd. |
| 1971 | Direct business dealing with Sears,Roebuck and Co. in the U.S. began. |
| 1972 | Business dealing with Sears,Simpson and Co. in Canada also began. |
| 1975 | Tokyo branch office was opened. |
| 1976 | Kajima plant was founded.Another tunnel kiln for oxidation and reduction was installed. Osaka branch office was opened. |
| 1977 | JIS license No.477043 was permitted for porcelain floor tiles by ministry of commerce and industry. |
| 1978 | Import from Italy was began. Nittai's floor tiles was used in Tsukuba University. JIS mark was permitted on stone ware wall tiles and stone ware floor tiles. Main office was moved to Oryu plant. |
| 1979 | Office general management by computer was began. |
| 1980 | Gifu plant was founded. |
| 1981 | Import from Spain was began. |
| 1983 | Gifu second plant was founded. Fukuoka branch office was opened. |
| 1986 | Gifu third plant was founded. |
| 1988 | Gifu forth plant was founded. |
| 1990 | Dormitory for singles “Ceratopia” was founded. |
| 1991 | Fuki plant was founded. |
| 1992 | JIS license No.491035 was permitted at Gifu plant by ministry of commerce and industry. |
| 1996 | New main office was opened in Taketoyo-cho,Aichi prefecture as 60th anniversary. |
| 1999 | Recycling brick,made of mud of waterworks,was made first in Japan. |
| 2000 | Both Hachiro Mizuno and Masayuki Mizuno are inagurated as a chairman of the board of directors and a president-director. |
| 2001 | Sapporo branch office was opened. |
| 2001 | Established NTL (Xiamen) Ceramic Co., Ltd., a joint corporation, in Fujian, China. |
| 2003 | Awarded regional prize by the Medium and Small Company Research Institute. |
| 2003 | Established a subsidiary company Ritai (Ningbo) Ceramic Co., Ltd. in Zhejiang, China. |
| 2005 | Celebrated the company's 70th anniversary. |