Tā zhuānmén dào Rìběn qǔjīng, yánjiū xiānjìn de zhìzào jìshù.
He went specifically to Japan to learn, studying advanced manufacturing techniques.
Tips
history
取经 comes from the story of the monk Xuanzang traveling to India to obtain Buddhist scriptures, famously fictionalized in Journey to the West (《西游记》). Today it's used figuratively for seeking knowledge or experience.