Odagiri had to fly more than 15 hours over 12,500km in order to get to Cuba's capital Havana for the filming. On the set, instructions were all in Spanish. Although the filming was to start from 3 September, Odagiri flew to Havana ahead of schedule on 15 August so as to get used to the environment. Prior to the filming, he had to keep his hair long for three months and not cut his nails for two months so as to look like a revolutionist. Subsequently, as the filming moved on to the scenes featuring his character's younger days, he had to eat a lot of sweet stuff to regain the weight he lost.