| Year | Area | Context |
| 1868 | Japan | Mr. Asakichi Shiraha，the founder of koasa renamed “Kojima-ya” as “Koasa”, the shop which operates seafood & fuel products. |
| 1921 | Japan | Koasa has functioned Wholesale House of Dried Seaweed Products. |
| 1948 | Japan | Koasa Corporation was established. |
| 1973 | Japan | Nico-Nico Nori Inc. was set up (originally estsablished in 1921.) |
| 1974 | Japan | The establishment of Yamako Co., Ltd. |
| 1990 | Japan | The Opening of Yamako Usuki Art Museum. |
| 1991 | Singapore | Nico-Nico Foods(S) Pte Ltd was established. |
| 1992 | China | Lianyungang Shenxian Laver Co., Ltd. was founded. |
| 1993 | China | The establishment of Lianyungang Xianqiao Laver Co., Ltd. |
| China | The establishment of Lianyungang Gaoyu Laver Co., Ltd. | |
| China | The establishment of Lianyungang Qinshandao Laver Co., Ltd. | |
| 1994 | China | Mr. Kiyoshi Shiraha was awarded “ LianYunGang Honorary Citizen.” |
| China | Tianjin Shanhaiguan Foods Co., Ltd was founded. | |
| 1995 | China | The establishment of Lianyungang Yamako Laver Co., Ltd. |
| China | The establishment of Nico Four Seas (Shantou) Co., Ltd. | |
| 1997 | China | The opening of International Laver Trading Center. |
| 1998 | China | Mr. Kiyoshi Shiraha was awarded “ Honorary Citizen of JiangSu Province. ” |
| 2000 | Taiwan area | President Yamako Corp. was established. |
| S. Korea | SamHae Yamako Co., Ltd. was established. | |
| 2001 | China | The establishment of Lianyungang Yamaka Laver Co., Ltd. |
| 2002 | China | Lianyungang Baiyu Shenxian Laver Co., Ltd. was established. |
| 2005 | China | The establishment of Fujian Shenshilan Yamako Laver Co., Ltd. |
| China | The opening of Nantong Yamako. | |
| 2006 | China | Yancheng Yamako Laver Co., Ltd was founded. |
| 2008 | China | Koasa (Shanghai) Trading Co., Ltd. was established. |