| 2008 | Nov. | Established Click here for “History” of TOHO HOLDINGS. |
|---|---|---|
| 2009 | Apr. | Shift to a pure holding company structure and change of the company name from TOHO PHARMACEUTICAL to TOHO HOLDINGS. |
| Oct. | Kyushu Toho (Kumamoto) is merged with Mori Pharmaceutical (Miyazaki) to establish Kyushu Toho | |
| 2010 | Jan. | SANUS (Hiroshima) is merged with OMWELL(Hiroshima) to establish SAYWELL |
| Feb. | ASUCOME (Sendai) becomes a wholly owned subsidiary. | |
| Jun. | Okinawa Toho (Naha) becomes a wholly owned subsidiary. | |
| Oct. | ASUCOME (Sendai) is merged with TOHO PHARMACEUTICAL. | |
| 2011 | Oct. | Koizumi Yakuhin (Sendai) becomes a wholly owned subsidiary. |
| 2012 | Jan. | Shouei (Aomori) is merged with TOHO PHARMACEUTICAL. |
| 2013 | Jul. | Koizumi Yakuhin (Sendai) is merged with TOHO PHARMACEUTICAL. Okinawa Sawai Pharmaceutical (Naha) becomes a wholly owned subsidiary. |
| Oct. | Honma Toho (Niigata), Yamaguchi Toho (Tsuchiura), Ogawa Toho (Takasaki) and Sue Pharmaceutical (Midori) are merged with TOHO PHARMACEUTICAL. | |
| 2014 | Jan. | Okinawa Toho (Nakagami-gun) is merged with Okinawa Sawai Pharmaceutical (Naha) to establish Okinawa Toho |
| 2017 | Apr. | Godo Toho (Osaka) is merged with TOHO PHARMACEUTICAL. |
| 2018 | Sep. | SAYWELL (Hiroshima) is merged with Kyoso Mirai Yamaguchi Pharmaceutical (Yamaguchi) and Kyoso Mirai Hiroshima Pharmaceutical (Hiroshima) to establish SAYWELL. Kyushu Toho (Fukuoka) is merged with Kyoso Mirai Fukuoka Pharmaceutical (Fukuoka), Kyoso Mirai Oita Pharmaceutical (Oita), Kyoso Mirai Kumamoto Pharmaceutical (Kumamoto) and Kyoso Mirai Kagoshima Pharmaceutical (Kagoshima) to establish Kyushu Toho Okinawa Toho (Okinawa) is merged with Kyoso Mirai Okinawa Pharmaceutical (Okinawa) to establish Okinawa Toho. |
| Oct. | Hokuriku Toho (former KYOUEI DRUG WHOLESALERS, Toyama) becomes a wholly owned subsidiary. | |
| 2024 | Apr. | Hokuriku Toho (Toyama) is merged with TOHO PHARMACEUTICAL. |