Here is a recommended fountain pen tour for those who would like to hit several of the main pen places in one day. This tour allows you to see four pen places.

From the North:

Start at Maruzen, walk south about 5 minutes to the Pilot Pen Station, and then walk another 5 minutes to Eurobox.

The Subway Ginza Line runs under the main street (in yellow on the map). Walk back to the Kyobashi Station near the Pilot Pen Station, and take the Ginza Line to Omotesando Station and you can also visit Pen Boutique Shosaikan.

This tour will only work on days when all four pen places are open, which are Thursdays, Fridays and Saturdays.

You can also start at Eurobox and end up at Maruzen and take the Ginza Line at Nihonbashi Station.

A Fountain Pen Tour
on the JR Keihin Tohoku Line

Here is another tour of eight pen shops on three stations on the Keihin Tohoku Line. Since there is no walking between shop locations, I did not make a new map. Just stay on the Keihin Tohoku Line and use the maps for each area when you reach the stations.

From the North:

Okachimachi Station

Ameyoko (five discount pen shops)

Fullhalter

Juzensha