About 100 meters (about 330 ft.) down the Sumida River from this monument, on the riverbank, there used to be famous no Matsu tree Shubi no Matsu. (pine tree of success).
The origin of the name of the pine tree Shubi is not exactly clear but here are some explanations:
1. It was named because a man, a shogun's retainer, 'successfully' rode a horse across the flooded Sumida River from the pine tree to the other bank in the presence of the third shogun, Iemitsu.
2. Men of the world talked together under this pine tree about their 'Shubi (success)' at Yoshiwara when they crossed the Sumida river.
3. Laver (edible seaweed) used to be harvested here using 'hibi' (long sticks to collect laver) stuck in the river, and the pronunciation of 'hibi' was corrupted into 'shubi.'
The first 'Shubi no Matsu' was blown down during the An'ei era (1772-1780), its successor died during the Ansei era (1854-1859), the third pine died at the end of the Meiji era (around 1910), and their successors were entirely destroyed by the fires of the Kanto Great Earthquake of 1923 and the Second World War. In December, 1962, members of Asakusa-nanbu Association of Commerce, Industry and Tourism regretted the loss of these pines and built a monument close to this bridge in cooperation with the local people. The present pine monument is said to be the seventh tree.