In this Wednesday, May 22, 2019, photo, a Yamanote Line train departs from Ikebukuro Station in Tokyo. Operated by the East Japan Railway Co., the Yamanote Line in Tokyo makes a loop around the center of the city, connecting 29 stations that include key stops such as Shinjuku, Shibuya and Ikebukuro. A complete loop of about an hour offers scenes of Japanese daily lives: jam-packed morning commute, views of the famous Shibuya crossing, high-rises, downtown shopping arcades, and a quick break at a noodle stand. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, June 4, 2019, photo, a Yamanote Line train travels above commuters walking across the crossing during evening rush hours in the Shinjuku district of Tokyo. Operated by the East Japan Railway Co., the Yamanote Line in Tokyo makes a loop around the center of the city, connecting 29 stations that include key stops such as Shinjuku, Shibuya and Ikebukuro. A complete loop of about an hour offers scenes of Japanese daily lives. (Photo by Jae C. Hong/AP Photo)





In this Wednesday, May 22, 2019, photo, a man walk on the bridge as a Yamanote Line train departs from Ikebukuro Station in Tokyo. Operated by the East Japan Railway Co., the Yamanote Line in Tokyo makes a loop around the center of the city, connecting 29 stations that include key stops such as Shinjuku, Shibuya and Ikebukuro. A complete loop of about an hour offers scenes of Japanese daily lives: jam-packed morning commute, views of the famous Shibuya crossing, high-rises, downtown shopping arcades, and a quick break at a noodle stand. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, a man in a black suit waits for a train to arrive on a platform at Shinagawa Station in Tokyo. Operated by the East Japan Railway Co., the Yamanote Line in Tokyo makes a loop around the center of the city, connecting 29 stations that include key stops such as Shinjuku, Shibuya and Ikebukuro. A complete loop of about an hour offers scenes of Japanese daily lives. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, a man reacts in a packed Yamanote Line train during evening rush hours in Tokyo. Want to take a glimpse of daily life in downtown Tokyo? Take a ride on the Yamanote loop line. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





In this Saturday, May 25, 2019, photo, a commuter falls asleep on a platform as a Yamanote Line train departs in Tokyo. Want to take a glimpse of daily life in downtown Tokyo? Take a ride on the Yamanote loop line. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, people wait in line to catch a Yamanote Line train in front of an advertisement for Japanese plum wine at Osaki Station in Tokyo. Running above ground, views from wide windows on the train range from high-rises to local shopping arcade as the train covers different parts of the city. The line, according to company statistics, moves roughly 3 to 4 million people daily, more than the entire population of Jamaica. (Photo by Jae C. Hong/AP Photo)





In this Wednesday, May 22, 2019, photo, a woman wearing a kimono stands next to a young woman wearing sneakers in a packed train traveling along the Yamanote Line in Tokyo. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





In this Friday, May 24, 2019, photo, commuters waiting for a train are seen through the window of a Yamanote Line train at Shimbashi Station in Tokyo. Running above ground, views from wide windows on the train range from high-rises to local shopping arcade as the train covers different parts of the city. The line, according to company statistics, moves roughly 3 to 4 million people daily, more than the entire population of Jamaica. (Photo by Jae C. Hong/AP Photo)





In this Saturday, May 25, 2019, photo, commuters stand in a packed Yamanote Line train while waiting for the train to depart at Shinjuku Station in Tokyo. Want to take a glimpse of daily life in downtown Tokyo? Take a ride on the Yamanote loop line. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, a group of commuters wearing black suits walk down the steps to catch a Yamanote Line train at Osaki Station in Tokyo. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, a man eats his breakfast in a noodle shop located on a platform between two Yamanote Line rails as a group of commuters wait in line to catch a train during morning rush hours at Shinagawa Station in Tokyo. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, commuters make their way past people waiting in line as they get off a Yamanote Line train during morning rush hours at Shinjuku Station in Tokyo. Trains are always packed during morning and evening rush hours as they are notoriously known. It's so densely packed that passengers don't even have to grab a handrail to stand upright despite swaying. There are shoves from commuters who can't afford to wait another few minutes for a next train, but no one growls in irritation. It's usually forgiven with just a little nod, a gesture of apology. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, commuters stand in a packed Yamanote Line train at Shinjuku Station in Tokyo. Trains are always packed during morning and evening rush hours as they are notoriously known. It's so densely packed that passengers don't even have to grab a handrail to stand upright despite swaying. There are shoves from commuters who can't afford to wait another few minutes for a next train, but no one growls in irritation. It's usually forgiven with just a little nod, a gesture of apology. (Photo by Jae C. Hong/AP Photo)





In this Tuesday, May 21, 2019, photo, a Yamanote Line train conductor sits in a control room as another Yamanote Line train approaches Ebisu Station in Tokyo. Operated by the East Japan Railway Co., the Yamanote Line in Tokyo makes a loop around the center of the city, connecting 29 stations that include key stops such as Shinjuku, Shibuya and Ikebukuro. A complete loop of about an hour offers scenes of Japanese daily lives: jam-packed morning commute, views of the famous Shibuya crossing, high-rises, downtown shopping arcades, and a quick break at a noodle stand. (Photo by Jae C. Hong/AP Photo)





In this Saturday, May 25, 2019, photo, a young man wearing a traditional kimono walks past a packed Yamanote Line train at Shinjuku Station in Tokyo. Operated by the East Japan Railway Co., the Yamanote Line in Tokyo makes a loop around the center of the city, connecting 29 stations that include key stops such as Shinjuku, Shibuya and Ikebukuro. A complete loop of about an hour offers scenes of Japanese daily lives. (Photo by Jae C. Hong/AP Photo)





In this Friday, May 24, 2019, photo, two commuters run up the steps to catch a Yamanote Line train at Shinjuku Station in Tokyo. Want to take a glimpse of daily life in downtown Tokyo? Take a ride on the Yamanote loop line. For most Tokyoites, the line means an incredibly punctual and efficient transportation system for commuting. For tourists, it offers a glimpse into the life of ordinary people living in the city. (Photo by Jae C. Hong/AP Photo)





Commuters exit the platform at Shinjuku station, said to be the busiest railway station in the world. (Photo by Craig Ferguson/LightRocket via Getty Images)