In this paper, we deal with melody completion, a technique which smoothly completes partially-masked melodies. Melody completion can be used to help people compose or arrange pieces of music in several ways, such as editing existing melodies or connecting two other melodies. In recent years, various methods have been proposed for realizing high-quality completion via neural networks. Therefore, in this research, we examine a method of melody completion based on an image completion network. We represent melodies as images and train a completion network to complete those images. The completion network consists of convolution layers and is trained in the framework of generative adversarial networks. We also consider chord progression from musical pieces as conditions. From the experimental result, it was confirmed that the network could generate original melody as a completion result and the quality of the generated melody was not significantly worse than the result of a simple example-based melody completion method.

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For a long time, it was considered that Japanese popular music would not be received in Western market. However, based on the popularity of Japanese Anime and Manga in overseas market, Japanese popular music became popular lately particularly in Western countries. For example, some Japanese musicians were invited to some conventions in Western countries in these years. This kind of conventions introduce Japanese modern subculture such as Anime, Manga, popular music and fashion to Western consumers and gather over ten thousands people in a few days. Also, there are some music labels in Europe, which specialize J-rock (Japanese rock music). Some J-rock musicians made a contract with one of them and release their music in Europe. Focussing on the business side of the international music business, this paper shows how the development of Japanese popular music in Western market is carried out; mechanism, structure, and network of the music business.

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