Houseflags of Japanese shipping companies

image by Phil Nelson
Source: Flags, Funnels and Hull Colours, 1963 [ste63]

Miyachi Kisen K.K. appears to have ceased in the mid 1970s.
Neale Rosanoski, 5 March 2003

Naikai Eisen K.K.

image by Jarig Bakker, 1 November 2005
Source: Brown's Flags and Funnels Shipping Companies of the World [lgr95]

Nakajima Kisen

Nakajima Kisen is a ferry company active on the Inland (Seto) Sea, Japan - situated between the main islands of Honshu, Shikoku, and Kyushu - Nakajima Kisen Co., Ltd the firm maintains a modest website (in Japanese).

A Wiki page (in Japanese) on this firm states:

The current firm was founded in 2004, the result of privitization of formerly public, locally organized, transportation. A number of lines connects Nakajima (now merged with Matsuyama City) to Takahama and other places.

nifty.com presents Nakajima Kisen's fleet.

The company homepage shows the house flag as a drawing: see attachment < jp~naka.gif> and on a photo, flying on a ferry (mast and bows): see attachment of detail < jp~naka2.jpg> . From the photo the flag is not really square as on the drawing, but rectangular.

Showing the national colours, a red phi-like sign ("ö" fully closed on the left side) is placed on a white field.
Jan Mertens, 4 November 2008

Nakamura Kisen K.K.

image by Phil Nelson
Source: Flags, Funnels and Hull Colours, 1963 [ste63]

Nakamura Kisen K.K. another popular name with at least 6 located. This appears to belong to the Kobe company which operated until the early 1970s.
Neale Rosanoski, 5 March 2003

Nakano Kisen K.K.

image by Phil Nelson
Source: Flags, Funnels and Hull Colours, 1963 [ste63]

Nakano Kisen K.K. appears to have ceased in the early 1970s.
Neale Rosanoski, 5 March 2003

Namura Kisen K.K.

image by Phil Nelson
Source: Flags, Funnels and Hull Colours, 1963 [ste63]