| 2006年08月 |
Propolife Corporation established in Tsurumi-ku, Yokohama City. (Capital: 3 million yen) |
| 2007年07月 |
Head office relocated to the same ward. |
| 2008年07月 |
Started renovation design and construction. |
| 2008年08月 |
Started selling owned properties. |
| 2009年02月 |
Started architectural design and construction. |
| 2009年10月 |
Moved the head office to Kawasaki, Kawasaki City. |
| 2012年04月 |
Opened "CHRONICLE APARTMENT HOUSE" a website specializing in our seller's original renovation brand. |
| 2012年07月 |
Head office relocated to Chuo-ku, Tokyo. |
| 2012年09月 |
Opened our first restaurant, "Nikuan Kotakino Shirokane Honten" at Minato ward, Tokyo. |
| 2013年01月 |
Started sales of "Nathalie Residence Yokohama Tsurumi", the first condominium built for sale by the seller/owner. |
| 2013年04月 |
Opened representative office in Ho Chi Minh City, Vietnam. |
| 2013年09月 |
Commenced sales of Chronicle Residence Yokohama Aobadai, our first single-building renovated condominium. : Spun off food and beverage business into "Kotakino Co." |
| 2013年10月 |
PROPOLIFE VIETNAM CO.,LTD. established in Vietnam. |
| 2014年10月 |
Launched PROSTYLE, a brand of newly built condominiums for sale, and began sales of the first building, Prostyle Yokohama Bashamichi. |
| 2015年02月 |
Chino Tatemono Management Co.,Ltd. becomes a wholly owned subsidiary. |
| 2015年09月 |
Testa Co., Ltd. becomes a wholly owned subsidiary. |
| 2015年11月 |
Opened "Wooden Interior Store Mokume" on Rakuten Market and started online sales of original housing equipment and building materials. |
| 2015年12月 |
Head office relocated to Chiyoda-ku, Tokyo. : Changed company name from Testa Corporation to "Chronicle Construction Co.". |
| 2016年05月 |
Renovation condominium brand "CHRONICLE APARTMENT HOUSE" is renamed "LOG MANSION". |
| 2016年11月 |
Yantai Toyo Wood Works Co., Ltd. becomes a wholly owned subsidiary. |
| 2017年04月 |
Establishment of pure holding company, Propo Life Group, in conjunction with the change to a holding company. : Development business was split off to "Prostyle Co.". At the same time, Propo Life Co., Ltd. changes its name to Chronicle Co. |
| 2017年05月 |
Establishment Propolife Hotels Co. |
| 2017年08月 |
Yantai Toyo Wooden Industry Co., Ltd. renamed Yantai Propo Life Wooden Industry Co. |
| 2018年01月 |
"Okinawa Igeto Inc." becomes a wholly owned subsidiary. |
| 2018年08月 |
Opened "PROSTYLE Ryokan Yokohama Bashamichi", as the first PROPOLIFE Hotels Co. |
| 2019年04月 |
Head office relocated to Minato-ku, Tokyo. : Opened the Omotesando main showroom of Chronicle Inc. |
