| 1981-05 |
Fushimi Construction Industry Co., Ltd. established |
| 1983-11 |
Company building completed in Yanagisawa, Hoya City (present-day Nishitokyo City) |
| 1983-11 |
Company name changed to Fushimi Construction Co., Ltd. |
| 1995-07 |
Started new condominium and detached house development business |
| 1996-04 |
Started full-scale condominium development business |
| 1999-04 |
Started full-scale detached house development business |
| 2000-04 |
Kunitachi Sales Office opened |
| 2000-09 |
Company name changed to ARNEST ONE CORPORATION |
| 2001-03 |
Nagayama Sales Office opened |
| 2001-06 |
Musashi-Kosugi Sales Office opened |
| 2002-02 |
Listed on the JASDAQ (over-the-counter) market |
| 2002-05 |
Funabashi Sales Office opened |
| 2002-12 |
Sayama Sales Office opened |
| 2003-07 |
Aobadai Sales Office opened |
| 2003-08 |
Head office relocated to Nishihara-cho, Nishitokyo City |
| 2003-12 |
Fussa Sales Office opened |
| 2004-01 |
Listed on the Second Section of the Tokyo Stock Exchange |
| 2004-04 |
Omiya Sales Office opened, Atsugi Sales Office opened |
| 2004-11 |
Soka Sales Office opened |
| 2005-03 |
Listed on the First Section of the Tokyo Stock Exchange |
| 2005-03 |
Totsuka Sales Office opened, Osaka Sales Office opened, Hachioji Sales Office opened |
| 2005-09 |
Matsudo Sales Office opened |
| 2006-01 |
Chiba Sales Office opened, Fukuoka Sales Office opened |
| 2006-04 |
Fujisawa Sales Office opened |
| 2006-07 |
Nagoya Sales Office opened |
| 2006-08 |
Kyoto Sales Office opened, Aone Plus Co., Ltd. established as a subsidiary |
| 2006-11 |
Sangenjaya Sales Office opened, Odawara Sales Office opened |
| 2006-12 |
Toda Sales Office opened |
| 2007-03 |
Following the relocation of the Kunitachi Sales Office, the name was changed to Tachikawa Sales Office |
| 2007-04 |
Head office relocated to Kitahara-cho, Nishitokyo City, Akashi Sales Office opened |
| 2007-05 |
Ayase Sales Office opened |
| 2007-09 |
Tokorozawa Sales Office opened, Ushiku Sales Office opened |
| 2007-10 |
Kumamoto Sales Office opened |
| 2008-04 |
Sagamihara Sales Office opened, Shin-Yokohama Sales Office opened, Yamato Sales Office opened, Kasukabe Sales Office opened, Sendai Sales Office opened, Nara Sales Office opened |
| 2008-09 |
Following the relocation of the Totsuka Sales Office, the name was changed to Konandai Sales Office |
| 2008-10 |
Kitakyushu Sales Office opened |
| 2009-01 |
Okazaki Sales Office opened |
| 2009-03 |
Nagayama, Musashi-Kosugi, Sangenjaya, and Kumamoto Sales Offices closed |
| 2010-04 |
Utsunomiya Sales Office opened, Takasaki Sales Office opened, Machida Sales Office opened : ARNEST WING CORPORATION established as a subsidiary |
| 2010-10 |
Shizuoka Sales Office opened, Ichinomiya Sales Office opened |
| 2010-11 |
Kusatsu Sales Office opened |
| 2011-01 |
Kurume Sales Office opened |
| 2011-08 |
Sakai Sales Office opened |
| 2011-09 |
Ishinomaki Sales Office opened, Fuji Sales Office opened |
| 2011-11 |
Toyohashi Sales Office opened, Koiwa Sales Office opened, Shirakawa Sales Office opened |
| 2011-12 |
Morioka Sales Office opened |
| 2012-01 |
Kuki Sales Office opened |
| 2012-02 |
Moriya Sales Office opened |
| 2012-03 |
Mizuhodai Sales Office opened |
| 2012-06 |
Narimasu Sales Office opened |
| 2012-07 |
Kobe Sales Office opened, Isesaki Sales Office opened |
| 2012-09 |
Following the relocation of the Akashi Sales Office, its name was changed to Himeji Sales Office. |
| 2012-10 |
Yokkaichi Sales Office, Ashikaga Sales Office, and Kagoshima Sales Office were opened. |
| 2012-11 |
Hiroshima Sales Office was opened. |
| 2013-01 |
Osaka Sales Office relocated to Higashiyodogawa-ku, Osaka City. |
| 2013-06 |
Kumagaya Sales Office, Narita Sales Office, and Sapporo Sales Office were opened. |
| 2013-07 |
Yamagata Sales Office and Kashii Sales Office were opened. Nagoya Sales Office relocated to Kita-ku, Nagoya City. |
| 2013-08 |
Mito Sales Office and Kariya Sales Office were opened. |
| 2013-10 |
Ayase Sales Office relocated, and Koriyama Sales Office was opened. |
| 2013-11 |
Following the establishment of the integrated holding company "Iida Group Holdings Co., Ltd." and its listing on the First Section of the Tokyo Stock Exchange, the company was delisted from the stock exchange. |
| 2014-06 |
Kisarazu Sales Office was opened. |
| 2014-07 |
Mishima Sales Office opened, Iwaki Sales Office opened, Shiroishi Sales Office opened, Oyama Sales Office opened |
| 2014-10 |
Niigata Sales Office opened |
| 2014-11 |
Chofu Sales Office opened |
| 2014-12 |
Okinawa Sales Office opened |
| 2015-01 |
Higashi-Osaka Sales Office opened |
| 2015-03 |
Toyota Sales Office opened, Kumamoto Sales Office opened |
| 2015-06 |
Okayama Sales Office opened, Akashi Construction Office opened, Fukuoka Sales Office relocated to Hakata Station East, Hakata Ward, Fukuoka City |
| 2015-07 |
Nagano Sales Office opened |
| 2015-08 |
Hirakata Sales Office opened |
| 2015-09 |
Hachinohe Construction Office opened |
| 2015-10 |
Fukushima Sales Office opened |
| 2015-11 |
Hachinohe Sales Office opened |
| 2015-12 |
Hamamatsu Sales Office opened |
| 2016-03 |
Fukui Sales Office opened |
| 2016-03 |
Omiya Sales Office relocated to Sakuragi-cho, Omiya-ku, Saitama City |
| 2016-04 |
Osaki Construction Office opened |
| 2016-12 |
Tajimi Sales Office opened |
| 2017-03 |
Kofu Sales Office opened |
| 2017-03 |
Sawara Sales Office opened |
| 2017-03 |
Fukuyama Sales Office opened |
| 2017-03 |
Wakayama Sales Office opened |
| 2017-05 |
Ishinomaki Sales Office relocated to Tachicho, Ishinomaki City, Miyagi Prefecture |
| 2017-06 |
Kakegawa Sales Office opened |
| 2017-07 |
Akashi Sales Office opened |
| 2017-08 |
Akita Sales Office opened |
| 2017-10 |
Ichinoseki Sales Office opened |
| 2017-10 |
一関営業所開設 |
| 2017-11 |
Shimo-Osaki Recycling Treatment Plant opened in Shiraoka City |
| 2017-11 |
Yamaguchi Sales Office opened |
| 2017-11 |
白岡市下大崎リサイクル処理場開設、山口営業所開設 |
| 2018-01 |
Saga Sales Office opened |
| 2018-01 |
佐賀営業所開設 |
| 2018-03 |
Kanazawa Sales Office opened |
| 2018-03 |
金沢営業所開設 |
| 2018-07 |
Aizuwakamatsu Construction Office opened |
| 2018-07 |
会津若松工事事務所開設 |
| 2018-12 |
Takatsuki Sales Office opened |
| 2018-12 |
Okinawa Sales Office opened |
| 2018-12 |
Kumamoto Construction Office opened |
| 2018-12 |
Gifu Sales Office opened |
| 2018-12 |
Naha Sales Office renamed from former Okinawa Sales Office upon opening of the Okinawa Sales Office |
| 2018-12 |
高槻営業所開設、沖縄営業所開設、熊本工事事務所開設、岐阜営業所開設、沖縄営業所開設に伴い旧沖縄営業所の名称を那覇営業所へ変更 |
| 2019-06 |
Yamagata Sales Office relocated to Kasumi-cho, Yamagata City, Yamagata Prefecture |
| 2019-06 |
山形県山形市香澄町に山形営業所移転 |
| 2019-09 |
Niigata Sales Office relocated to Yoroi, Chuo-ku, Niigata City, Niigata Prefecture |
| 2019-09 |
Himeji Sales Office relocated to 3-23 Higashi-Enmatsu, Himeji City, Hyogo Prefecture |
| 2019-09 |
新潟県新潟市中央区鎧に新潟営業所移転、兵庫県姫路市東延末3-23に姫路営業所移転 |
| 2019-10 |
Oita Sales Office opened |
| 2019-10 |
Matsumoto Sales Office opened |
| 2019-10 |
大分営業所開設、松本営業所開設 |
| 2020-01 |
Kumamoto Sales Office and Kumamoto Construction Office relocated and integrated to Oe, Chuo-ku, Kumamoto City, Kumamoto Prefecture |
| 2020-01 |
熊本県熊本市中央区大江に熊本営業所・熊本工事事務所を移転し統合 |
| 2020-02 |
Akashi Sales Office relocated to Suzuricho, Akashi City, Hyogo Prefecture |
| 2020-02 |
Koiwa Sales Office closed |
| 2020-02 |
兵庫県明石市硯町に明石営業所移転、小岩営業所閉鎖 |
| 2020-03 |
Shunan Sales Office opened |
| 2020-03 |
Kitakami Construction Office opened |
| 2020-03 |
周南営業所開設、北上工事事務所開設 |
| 2020-10 |
Tsuruoka Sales Office opened |
| 2020-10 |
Mishima Sales Office relocated to Shibamoto-cho, Mishima City, Shizuoka Prefecture |
| 2020-10 |
Kuki Sales Office relocated to Honmachi, Kuki City, Saitama Prefecture |
| 2020-10 |
鶴岡営業所開設、静岡県三島市芝本町に三島営業所移転、埼玉県久喜市本町に久喜営業所移転 |
| 2020-11 |
Hitachi Sales Office opened |
| 2020-11 |
Isesaki Sales Office relocated to Ota-cho, Isesaki City, Gunma Prefecture |
| 2020-11 |
日立営業所開設、群馬県伊勢崎市太田町に伊勢崎営業所移転 |
| 2020-12 |
Miyazaki Sales Office opened |
| 2020-12 |
宮崎営業所開設 |
| 2021-01 |
Higashihiroshima Sales Office opened |
| 2021-01 |
Matsuyama Sales Office opened |
| 2021-01 |
東広島営業所開設、松山営業所開設 |
| 2021-03 |
Toyama Sales Office opened |
| 2021-03 |
Sendai Sales Office relocated to Taihaku-ku, Sendai City, Miyagi Prefecture |
| 2021-03 |
富山営業所開設、宮城県仙台市太白区に仙台営業所移転 |
| 2021-04 |
Sendai Izumi Sales Office opened |
| 2021-04 |
仙台泉営業所開設 |
| 2021-05 |
Kobe Sales Office relocated to Yawata-dori, Chuo-ku, Kobe City, Hyogo Prefecture |
| 2021-05 |
兵庫県神戸市中央区八幡通に神戸営業所移転 |
| 2021-06 |
Takamatsu Sales Office opened |
| 2021-06 |
高松営業所開設 |
| 2021-08 |
Nara Sales Office relocated to Sugiga-cho, Nara City, Nara Prefecture |
| 2021-08 |
奈良県奈良市杉ケ町に奈良営業所移転 |
| 2022-02 |
Kamaishi Sales Office opened |
| 2022-02 |
釜石営業所開設 |
| 2022-03 |
Nagasaki Sales Office opened |
| 2022-03 |
長崎営業所開設 |
| 2022-04 |
Tottori Sales Office established |
| 2022-04 |
鳥取営業所開設 |
| 2022-08 |
Cradle Farm established |
| 2022-08 |
クレイドルファーム開設 |
| 2022-10 |
Ueda Sales Office established |
| 2022-10 |
上田営業所開設 |
| 2022-12 |
Yamaguchi Sales Office relocated to Ogori Kogane-cho, Yamaguchi City, Yamaguchi Prefecture |
| 2022-12 |
山口県山口市小郡黄金町に山口営業所移転 |
| 2023-02 |
"Hotel Cradle Cabin Tateyama" opens |
| 2023-02 |
「ホテルクレイドルキャビン館山」開業 |
| 2023-03 |
Tokushima Sales Office established |
| 2023-03 |
徳島営業所開設 |
| 2023-05 |
Cradle Cabin Isesaki Factory established |
| 2023-05 |
クレイドルキャビン伊勢崎工場開設 |
| 2023-06 |
Iwaki Sales Office relocated to Kotaro-cho, Taira, Iwaki City, Fukushima Prefecture; Soka Sales Office relocated to Asahi-cho 4-chome, Soka City, Saitama Prefecture |
| 2023-06 |
福島県いわき市平字小太郎町にいわき営業所移転、埼玉県草加市旭町4丁目に草加営業所移転 |
| 2023-12 |
Shirakawa Sales Office relocated to Shirakawa City, Fukushima Prefecture |
| 2023-12 |
福島県白河市に白河営業所移転 |
| 2024-08 |
Kochi Sales Office established |
| 2024-08 |
高知営業所開設 |
| 2025-01 |
Matsue Sales Office established, and continues to operate to the present. |
| 2025-01 |
松江営業所開設、現在に至る。 |
