Please have a look at HIROTA News Letter Vol.18-22. (Only available in Japanese.)
The Contents
Vol.18 : Quality Check Method for Component Joints on Printed Circuit Boards
Vol.19 : Price hikes in electronic components (follow-up report)
Vol.20 : About Hydrogen Energy
Vol.21 : About DX(Digital Transformation)
Vol.22 : The State of the Semiconductor Market