Japanese 4 Kanji idiom meaning “success through determination and perseverance”. Read from left to right, it is pronounced as “Ga Shin Shou Tan”, and its roots actually in ancient Chinese history. During the Spring and Autumn period (7th – 4th century BC), the future King Gou Jian of the kingdom of Yue was taken prisoner and made a vassal of King Fucha of the kingdom of Wu after his father the king was killed in battle during their long war. While a prisoner, he slept (the first kanji) every night on firewood (second kanji) and chewed (third kanji) bitter liver (last kanji) to remind him of his shame of defeat until his release. Eventually, King Gou Jian rose to finally defeat King Fucha thus gaining his revenge.