1978 (Syowa 53th) Establish Ishii Gardening Service (start selling agricultural chemicals)
1979 (Syowa 54th) Expand items for selling (seeds, agricultural materials, fertilizers, materials for garden plant’s growing, landscape gardening and tree planting materials)
1989 (Heisei 1st) Convert Ishii Gardening Service into I.H.S Co., Ltd.
2006 (Heisei 18th) Start business using Internet
2007 (Heisei 19th) Start growing vegetable in plastic greenhouses (gingers, green soybeans, green beans)
2008 (Heisei 20th) Focus on cultivation of mini tomatoes in plastic greenhouses
2011 (Heisei 23th) Attend FOODEX JAPAN2011, which is regarded as business meeting of the earth and sea
2012 (Heisei 24th) Attend FOODEX JAPAN2012, which is regarded as business meeting of the earth and sea
2013 (Heisei 25th) Attend FOODEX JAPAN2013, which is regarded as business meeting of the earth and sea
2013 (Heisei 25th) Satrt processing crops
2014 (Heisei 26th) Appeared in Chiba Prefecture buyer’s guide (attending the business meeting) , attenfing FOODEX JAPAN2014