2008/3/16
"Acquisition of the closedown Matsushita Kofu factory" (Nihon Keizai Shimbun)

2008/3/26
"KOIKE enters Matsushita’s site" (Yamanashi Nichi-Nichi Shimbun)

2007/11/21
"Koike to produce quartz part - mass production system in next spring -"(Nikkei)

2007/11/21
"Next-generation DVD part development" (YamanashiNichi-Nichi)

2006/10/24
Correspondence to "mobile phone board and high function" (Yamanashi Nichi-nichi)

2006/5/3
KOIKE increase production of "Lithium Tantalate wafer" - increase sales results in mobile phone market.(Yamanashi Nichi-nichi)

2006/4/15
“KOIKE set for production capacity expansion by 25%” - for wafer to control static electricity corresponding to miniaturization.(Nikkei)

2006/4/12
300 Small & Medium Manufacturing Enterprises, 4 enterprises selected from the prefecture.(Nikkei)

2006/4/12
METI select 4 enterprises of the prefecture as Vigorous Small & Medium Manufacturing Enterprises.(Yamanashi Nichi-nichi)

2006/3/7
The address mark changed along with the consolidation of municipalities.

2006/4/12
Mobile phone market continues to expand up to year 2008.(Nikkei)