To clarify the population maintenance mechanism of Berberis sieboldii, which grows in the overly humid stressful environment of a spring-fed marsh, we investigated the distribution, emergence and survival of stem at Kippataike Mrash, a typical spring-fed marsh in Toki City, Gifu Prefecture from 2017 to 2020. The advanced stems (stems that were growing in 2016) were distributed discontinuously and grew densely in areas with a higher coverage rate of woody plants. The total number of stems, including advanced stems, sprouts, and seedlings, had decreased by 114 (15.2％) over the four years from 748 in 2017, and the number of advanced stems in particular had decreased by 241 (39.6％) over the four years from 608 in 2017. On the other hand, the total number of stems, including seedlings and sprouts, increased by 127 (90.7％) from 140 in 2017. The proportion of sprouts to the total number of stems, including advanced stems, seedlings, and sprouts was higher than that of seedlings in each year, and this tendency became more pronounced year by year. The survival rate of sprouts was significantly higher than that of seedlings and also the growth rate of the sprouts was also higher than that of the seedlings. These results suggest that the population of B. sieboldii may persist in the spring-fed marsh by compensating for the decline in stem number through sprouting from the base of the trunks and rhizomes.