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The eruption of Sidoarjo hot mudflow (LUSI) has occurred more than 13 (thirteen) years and there are no signs of stopping. Lusi eruption is still active and characterized by geyser activity along with the release of solid and liquid material (Vanderkluysen et al., 2014). Lusi eruption still has the potential to continue to occur in the future, affecting a larger area. Over time, the initial paradigm of LUSI as a mud volcano turned into a volcano phenomenon. Not only mud and hot steam, this eruption also triggers the release of methane gas around the site of the burst. The results of studies that have been carried out have not been able to reveal explicitly the potential occurrence of volcanism at this time (neovulcanism) which emerged in the Kendeng zone in the East Java Basin. Therefore the birth of LUSI as a geyser and some hot water that appears in the kendeng zones becomes a window as well as a new perspective and challenge about the connection of tectonism and volcanism in a sedimentary basin system. Analysis of the geochemical properties of fluid coming out at LUSI and some geochemical hotspring characters that appear in the Kendeng zone in East Java basin can show fingerprints originating from the process of magmatism or not.