This SVG file shows a very simple image. Drawing uncomplicated graphics with a text editor seems more adequate than using a vector graphics program, and will often result in a dramatic reduction of file size.
Article 2 of Japanese copyright law defines that a work is eligible for copyright when it is a production in which thoughts or sentiments are expressed in a creative way and which falls within the literary, scientific, artistic or musical domain. Japanese courts have decided that to be copyrightable, a text logo needs to have artistic appearance that is worth artistic appreciation. Logos composed merely of geometric shapes and texts are also not copyrightable in general. See COM:CRT/Japan#Threshold of originality for more information.