Nishigori wanted everyone that had worked with him on TTGL, PSG and IMAS so he personally recruited everyone. Nishigori himself went to both Trigger and A1 and suggested the collaboration. Nishigori said that he wouldn't have gone along with the project if he didn't get both studios on board. Masayoshi Tanaka got involved via the A1 producer.
@Factor, это из интервью с продюсером франкса@F24