The 123-show world tour began on September 12, 1987 in Japan, and concluded on January 27, 1989 in the United States, and sponsored by soft drink manufacturer Pepsi.Sales of the drink in Japan doubled during the summer following the announcement, helped by an advertising campaign that offered free tickets and 30,000 souvenirs.[11] Currell arranged to have three complete systems: two to handle the music on stage and one for his hotel room for Jackson to record ideas while travelling, plus a dismantled setup for spare parts in case of a problem, and a full time technician.[16] In Tokyo, Jackson donated $20,000 to the parents of Yoshiaki Hagiwara, a five-year-old boy who was kidnapped and murdered, after he watched a news report about the tragedy.[14] Jackson wrapped the Japanese leg by donating several personalised items for a charity auction, including clothes and glasses worn during the tour.The loud and enthusiastic crowds were a contrast to the Japanese audience, who were instructed to remain quiet and make little noise, and made it difficult for the group to hear the count-ins at the beginning of a number.[8] Following the 1987 dates Jackson wanted to revamp the production with a larger stage set-up, the addition of new numbers including "Smooth Criminal" and "Man in the Mirror", and new musical arrangements.On the final day, Jackson allowed 420 school pupils to watch him perform a full dress rehearsal after the children made him a rap music video in his honor.[25] The band rehearsed "Speed Demon" from Bad prior to Jackson's arrival two weeks in, and he liked the performance, but it was dropped from the set as he had no choreography to accompany the song.[27] The first of three concerts at Madison Square Garden in New York City in March served as a benefit to raise $500,000 to the United Negro College Fund.After Jackson's death it was revealed that the Stasi had kept a file on him, making extensive preparations to prevent East German fans to gather at the Brandenburg Gate to listen to the concert.[36][39] Jackson toured the United States for a second time between September 1988 and January 1989, with a return to Tokyo for nine shows in December which included a concert on Christmas Day.[2] The tour was planned to end in Tokyo, but Jackson suffered from swollen vocal cords after the first of six concerts in Los Angeles in November, and the remaining five were rescheduled for January 1989.During the run of shows in Tokyo, nine-year-old Ayana Takada was selected to receive a certificate by Jackson to commemorate the four millionth person to attend the tour.