Zero Fighter Red (Zerosen Red) (1961) page 88 by Kaizuka

Top Panel: "Bakudan touka!!" - "Bombs away!!" or "Dropping bombs!!"

Bottom Panel: Large sound effect - "Goooo" - "Roaaaar" (plane's engine)

Small sound effect - "Hyuuuu" - "Wheeew" or "Swoosh" (bombs whistling through the air)

Historical note: Zerosen Red and Japan's government-approved textbooks stress the heroism of Japan's military in the former and the horror of the atomic bombs and firebombs dropped by the US on Japanese cities in the latter. They omit or gloss over Japan's aggression and brutality. Japan invaded China in 1931 and 1937, allied itself with Hitler and Mussolini, expanded the war in 1941 in surprise attacks against the US and other countries, and committed widespread atrocities.

Regarding the latter, RJ Rummel's Statistics of Democide is instructive. "From the invasion of China in 1937 to the end of World War II, the Japanese military regime murdered near 3,000,000 to over 10,000,000 people, most probably almost 6,000,000 Chinese, Indonesians, Koreans, Filipinos, and Indochinese, among others, including Western prisoners of war. This democide was due to a morally bankrupt political and military strategy, military expediency and custom, and national culture (such as the view that those enemy soldiers who surrender while still able to resist were criminals)."

Based mostly on official figures released shortly after the war, 138,000 US and other Allied prisoners of war and internees were killed. POW death rate was nearly 29 percent.

That said, Japan isn't alone in misrepresenting history in secondary school textbooks. China's textbooks echo the Chinese Communist Party version of history to promote fealty to the party and state and ethnocentrism. "Lies My Teacher Told Me" by James Loewen documents biases, myths, and glaring errors including of omission in US history textbooks approved by state and local school boards for secondary schools.

Sources: "Statistics of Democide: Genocide and Mass Murder Since 1900" by R.J. Rummel (1998), "Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong" by James W. Loewen (2018), Wikipedia