No backdrop availableNo poster日本式サービス 強さの秘密2014DocumentaryNovember 8, 2014 · JapanSave to watchlistMark as seenShareDetailsStatusReleasedRelease dateNovember 8, 2014Original languageJapaneseSpoken languagesJapaneseCountriesJapanProductionNHKBudgetNot recordedRevenueNot recordedHomepageOfficial site