The internal documents and materials made by Nippon Chisso Hiryo group before World War II were inspected and examined. In particular, many drawings and documents of the Chosen Chisso Hiryo owned by Chisso Corporation were scanned or digitalized. Some city maps of the Hungnam district, North Korea, were also collected.
These historical materials allowed us to re-examine the layouts for some company house areas of Chosen Chisso Hiryo and to contribute to our deep understanding. Some drawings allowed us to examine several buildings and houses constructed in Hungnam district and to detect new or more detailed facts.
