Efforts to tackle immigration reform in Japan came to the forefront in the wake of the death of a Sri Lankan woman in custody last year. The country's immigration policy has been under fire for the indefinite detention of people who refuse to leave. Authorities have pledged to improve the situation, but some think more public involvement is needed before meaningful change can happen. Among them is an American filmmaker who made a documentary pointing at the ''black box'' of the Japanese immigration system, and even a former immigration officer. Rodrigue Maillard-Belmonte has been covering the issue for more than 20 years and explains what is at stake.