Is DSIP (delta sleep-inducing peptide) legal in Japan?

DSIP (delta sleep-inducing peptide) has no approval in PMDA's approved-drug lists (April 2004 to September 2026), and PMDA's package-insert database has no matching product. Under the PMD Act a drug needs MHLW approval (Art. 14) before it is marketed, selling one marketed without approval is prohibited (Art. 55(2)) and advertising it is banned (Art. 68). No MHLW or PMDA notice naming it was found, so we do not classify it as specifically banned. Individuals may import a prescription drug for their own use up to one month's supply and may not pass it on, and physicians may import an unapproved drug for a patient under their own responsibility.