In 2011, the Japanese Ministry of Defense (MOD) evaluated a proposal to develop a vehicle capable of networking with other systems and performing shoot-and-scoot tactics to replace the FH70.

[3] On 31 May 2018, the Acquisition, Technology & Logistics Agency (ATLA) received 5 prototypes from Japan Steel Works for testing and evaluation.

[4] Seven wheeled howitzers were procured for training purpose in the FY 2019 defense budget for a total of 5.1 billion yen.

[4] Compared to the towed FH70, the wheeled howitzer is designed to be mobile and networked to a Firing Command and Control System, which receives targeting information from artillery observers.

[7] According to the FY 2013 defense budget request, the wheeled howitzer features the barrel part used on the Type 99 155 mm self-propelled howitzer and body of a heavy wheeled recovery vehicle to reduce development cost.