Did the Japanese say there is a gun behind every blade of grass?

The phrase "There is a gun behind every blade of grass" is often attributed to a Japanese general during World War II, suggesting that Japan would fiercely resist any invasion of their homeland. However, there is no definitive evidence that this exact phrase was used by a Japanese official. It reflects the sentiment of Japan's willingness to defend itself vigorously, but its origins remain somewhat unclear and may be more of an interpretation or paraphrase of Japanese wartime rhetoric.