Under Investigation: The Next 20 Days
If the judge agrees there is probable cause to believe a crime has been committed, the court will issue an initial 10 day detention order to permit the police to continue their investigation. At the end of this 10 day period, the prosecutor can request a second 10 day detention period to continue the investigation further.
At the end of this detention period, the prosecutor must either ask the court for a formal indictment or release the prisoner. Of course, an indictment could be sought sooner if enough evidence is readily available or the prisoner could be released sooner if adequate evidence is not forthcoming.
Suspects jailed in Japan are prohibited from making or receiving phone calls. The precise terms of your confinement will be spelled out by the prosecutor. For most drug cases, prosecutors place a suspect incommunicado which bars them from receiving visitors other than a lawyer or a Consul, and from corresponding with anyone other than their lawyer or (in most cases) the Embassy or Consulate.
Some suspects incommunicado may also be prohibited from receiving mail or reading material from the Embassy or Consulate, although they are usually allowed to meet in person with a Consul and to write to a Consul. Incommunicado orders may continue until the first trial date.
Suspects not incommunicado are able to write and receive letters from family and friends. The police routinely censor all outgoing and incoming mail, except for correspondence from lawyers or a Consul. Consequently, there may be delays in sending or receiving mail if an English-speaking police censor is unavailable for screening.
Suspects not incommunicado are permitted to receive visitors during normal business hours. The visitor is separated from the suspect by a window and all such visits must be monitored by an English-speaking policeman. If a language-qualified policeman is unavailable, visitors may be turned away. Therefore it would be advisable for visitors to check ahead of time that the police station is prepared to receive them.
Until they are convicted, suspects wear their own clothes. Laundry facilities are normally available only once a week, so suspects should make arrangements to have sufficient clothing to stay clean. The prison also supplies basic toiletry items, but visitors can supply familiar brands of soap, toothpaste, shampoo, etc.
Visitors are also permitted to provide books, magazines and newspapers. News journals would be censored of any references to the suspect's own or related crimes. At the police's discretion, visitors can purchase snacks (including take-out meals) to supplement the normal jail food. Suspects can also purchase items through the police if they have no friends and relatives in Japan.
Follow this link for Part IV, the Trial.