The Square Kilometre Array (SKA) project, which is the world-biggest international cm/m radio interferometer project, is now in the pre-construction stage 1 during which the SKA organization (SKAO) proposes options of elements and systems of the first 10 % construction of SKA called the SKA phase 1 (SKA1). SKAO has been re-baselining the SKA1 according to realistic costs and scientific updates since a release of the SKA1 system baseline design in March 2013. The re-baseline will be approved by the SKA board in early March. As for a science side, the science team in SKAO conducted an update of an international SKA science book. More than 120 chapters were proposed and accepted for publication last year. Finally, in Japan, NAOJ has started financial supports for Japanese SKA activities since last year. I am visiting in SKAO on secondment to play a role of a liaison, supported by NAOJ and SKAO. Japanese SKA science working groups have edited a Japanese SKA science book, in which they reviewed Japanese sciences with SKA. I will talk about these progress related to the SKA project.