Actually is was the other way around. Japanese nationalism caused the bombings meaning the bombings didn't inspire nationalism. After the bombs, Japan had no nationalism left.

Japanese nationalism (国家主義 Kokka shugi?) encompasses a broad range of ideas and sentiments harbored by the Japanese peopleover the last two centuries regarding their native country, its cultural nature, political form and historical destiny. It is useful to distinguish Japanese cultural nationalism (see, nihonjinron) from political or state-directed nationalism (i.e., Japanese imperialism), since many forms of cultural nationalism, such as those associated with folkloric studies (i.e., Yanagita Kunio), were hostile to state-fostered nationalism.

imperialism

Isamu Kawakami has written:

'International morality and Japanese nationalism'

Margaret Sleeboom has written:

'Academic nationalism in China and Japan' -- subject(s): Chinese National characteristics, Japanese National characteristics, Nationalism