Is the connection between Ueno station on Keisei line and Ginza line in Tokyo internal?

Is the connection between Ueno station on Keisei line and Ginza line in Tokyo internal? - Electricity poles with cables located on hill at sundown

According to Google maps, there is an 8-minute walk between Ueno station (through Skyliner, Keisei line) to that on Ginza line, is that an internal connection? Or do I have to leave the station and enter the Subway?

Is this the case with all Rail stations?

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Is the connection between Ueno station on Keisei line and Ginza line in Tokyo internal? - Electric towers in countryside field under blue sky
Is the connection between Ueno station on Keisei line and Ginza line in Tokyo internal? - Transmission towers against endless sea and mount
Is the connection between Ueno station on Keisei line and Ginza line in Tokyo internal? - Metro station with passengers on platform





Keisei Skyliner Narita Airport to Tokyo Ueno 🇯🇵 Japan Airport Train Report




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Images: Francesco Ungaro, Dids, Dids, Elena Saharova