I posted a photograph of the callligraphy on display at my dojo
here.
心身統一の四大原則 Shinshin touitsu no yon dai gensoku Four Major Principles to Unify Mind and Body
1. 臍下の一点に心をしずめ統一する Seika no itten ni kokoro wo shizume toitsu suru Keep one point
2. 全身の力を完全に抜く Zenshin no chikara wo kanzen ni nuku Relax completely
3. 身体の総ての部分の重みを、その最下部におく Karada no subete no bubun no omomi wo sono saikabu ni oku Keep weight underside
4. 氣を出す Ki wo dasu Extend ki.