A physical distribution system comprising: a first conveyance path; a second conveyance path that merges with the first conveyance path at a first junction; a first sensor configured to detect a package passing along the first conveyance path to the first junction; a second sensor configured to detect a package passing along the second conveyance path to the first junction; anda processor configured to: count a first number of packages present in a first convergence monitoring section that is determined in the first conveyance path upstream the first junction, by using the first sensor, count a second number of packages present in a second convergence monitoring section that is determined in the second conveyance path upstream the first junction, by using the second sensor, determine an order in which packages in the first convergence monitoring section and packages in the second convergence monitoring section pass the first junction, based on the first number and the second number, and control the first and second conveyance paths, such that the packages pass the first junction in the determined order, characterized in that the processor determines a leading one of one or more packages in the first convergence monitoring section to pass the first junction first, when the first number is greater than the second number, and determines a leading one of one or more packages in the second convergence monitoring section to pass the first junction first, when the second number is greater than the first number. a first conveyance path; a second conveyance path that merges with the first conveyance path at a first junction; a first sensor configured to detect a package passing along the first conveyance path to the first junction; a second sensor configured to detect a package passing along the second conveyance path to the first junction; anda processor configured to: count a first number of packages present in a first convergence monitoring section that is determined in the first conveyance path upstream the first junction, by using the first sensor, count a second number of packages present in a second convergence monitoring section that is determined in the second conveyance path upstream the first junction, by using the second sensor, determine an order in which packages in the first convergence monitoring section and packages in the second convergence monitoring section pass the first junction, based on the first number and the second number, and control the first and second conveyance paths, such that the packages pass the first junction in the determined order, characterized in that the processor determines a leading one of one or more packages in the first convergence monitoring section to pass the first junction first, when the first number is greater than the second number, and determines a leading one of one or more packages in the second convergence monitoring section to pass the first junction first, when the second number is greater than the first number. count a first number of packages present in a first convergence monitoring section that is determined in the first conveyance path upstream the first junction, by using the first sensor, count a second number of packages present in a second convergence monitoring section that is determined in the second conveyance path upstream the first junction, by using the second sensor, determine an order in which packages in the first convergence monitoring section and packages in the second convergence monitoring section pass the first junction, based on the first number and the second number, and control the first and second conveyance paths, such that the packages pass the first junction in the determined order, characterized in that the processor determines a leading one of one or more packages in the first convergence monitoring section to pass the first junction first, when the first number is greater than the second number, and determines a leading one of one or more packages in the second convergence monitoring section to pass the first junction first, when the second number is greater than the first number.