Under the non-exclusive cooperation deal, Toshiba ESS will be responsible for customers and installation, the companies stated.
Meanwhile, Senvion will provide turbine technology, operation, maintenance services and technical support.
The two companies will focus on both onshore and offshore wind, they added.
Toshiba ESS stated it expected the wind power market in Japan to grow due to laws "creating a ready market environment".
Utilities are obliged to buy renewable power under feed-in tariff laws in Japan.
Toshiba ESS established an energy aggregation division in January to bring advances in Internet of Things (IoT) technology to its solar PV, wind power and energy demand management businesses.
The subsidiary of the Toshiba conglomerate also plans to expand its wind offerings by capitalising on its electric power system technology, such as its capabilities in AC/DC transmission and battery storage, it stated.
The company also owns a 15.6% stake in South Korean turbine manufacturer Unison.
Senvion, meanwhile, has been active in Japan since 2003 and opened an office in Tokyo in April 2016.
It currently has 144.1MW of installed capacity in Japan, according to Windpower Intelligence, the research and data division of Windpower Monthly. The country has just over 3.5GW installed.