99% sure you passed through a transfer gate in Tokyo station that requires you to produce two "tickets" (physical or virtual)—one for subway and one for Shinkan

99% sure you passed through a transfer gate in Tokyo station that requires you to produce two "tickets" (physical or virtual)—one for subway and one for Shinkansen. Always plenty confusing. I have to hold my phone (Suica app) and an EX card (Shinkansen card) together for a dual-NFC tap. I always forget one or the other.