Today's smartphones with three or more lenses are widespread. Among them, in the standard lens, the number of lenses is increasing due to high performance, and 7 lenses have become the mainstream. On the other hand, in a telephoto lens of 3 times or more, a periscope type in which a lens module is arranged parallel to a smartphone housing and an incident light is bent by a reflecting plate is popular in order to lengthen the focal length.

As the evolution of lenses in the future, I assume that the development of devices to give power to lenses and the development of technologies to reduce Ghost/Flare will be actively carried out.

The image quality of smartphones has been greatly improved in recent years, and the camera performance/feature are becoming very important when users purchase a smartphones. Compared to DSLR cameras, smartphone cameras are significantly inferior in terms of image sensor and lens performance due to their size limitations. However, applying a huge amount of computational cost and the improvement of image sensors unique to smartphones have been achieving a high quality image. This article introduces image processing technologies for smartphone cameras such as HDR（High Dynamic Range）, super resolution zoom and digital blur, and including the utilization of AI（Artificial Intelligence）technology.

In this paper, I explain the depth maps in smartphones from various companies, and introduce examples of depth maps usage and applications implemented.

In recent years, with the development of high-precision radiotherapy, the tool has been required to directly evaluate the dose in three dimensions from the viewpoint of further quality control and quality assurance（QC/QA）of radiotherapy plans. As one of the candidates, three-dimensional gel dosimeters using a radiation chemical reaction have been attracting attention. This review introduces the outline of these gel dosimeters, and issues and possibilities.

Yokohama village, which was a poor village in the sandbar, was selected as an open port under the Treaty of Amity and Commerce, developed through raw silk trade, and is now Japan's largest ordinance-designated city. According to the 1858 treaty, the open port was “Kanagawa” on the Tokaido. However, the Shogunate constructed the “Yokohama Open Port” by rush work with the intention of a closed settlement like Dejima in Nagasaki, in time for the opening date of July 1, 1859. The following year, the residents of Yokohama village were relocated and the Horikawa was excavated to create “Kannai” surrounded by waterways. In Toson Shimazaki's novel “Yoake-Mae”，a group of raw silk merchants from Kiso, who heard rumors about the high-priced raw silk market, visited Yokohama just after the opening of the port, approximately 400 Km away. And, through the eyes of the doctor who accompanied them, he gives a detailed explanation of the situation in Yokohama. Foreign photographers who came to Japan before and after the opening of the port have left valuable historical photographs of the time. In this report, author would like to follow “Yokohama Open Port” along with the novel “Yoake-Mae” and the historical photographs of foreign photographers.