The essay “Specters of East Asia” is the contribution of playwright, actor, and scholar Choi Jinseok to the volume Still Hear the Wound. It is based on a presentation made by Choi in March, 2007, at the Sakima Art Museum in Okinawa, whose courtyard faces directly onto the U.S. Marine Air Station Futenma, itself bordered by winding roads and chain-link fences. While protests over construction of a new airstrip in the coastal fishing village of Henoko swelled and continued in Okinawa, protests which continue in 2016, the museum hosted workshops in 2004 and 2007 as part of a series of events organized by the Asia, Politics, Art Project founded by poet/philosopher Lee Chonghwa of Seikei University, Tokyo. Its members were scholars, critics, and young artists dedicated to exploring, through art, often marginalized and suppressed memories of colonial violence shared across national boundaries in East Asia.

We present a study of droplet impingement on a two-layer liquid, specifically an oil droplet impinging on a layer of oil on water. In our experiments, the diameter and impact velocity of the droplet and the thickness of the oil layer were varied, and the maximum depth of the crater and the maximum height of the Worthington jet were measured. When the thickness of the oil layer was less than ${\sim }1.6$ times the droplet diameter, the depth of the crater depended on the thickness of the oil layer. Otherwise, the two-layer liquid behaved like a single layer. This observation is rationalized by considering the oil–water interface, whose deformation is negligible when the oil layer is thick but becomes significant when the oil layer is thinner. We define an effective Weber number for the two-layer liquid and show that the height of the Worthington jet is proportional to this effective Weber number.