(1) New diagnosis: Using our new method to detect and quantify a very tiny amount of a given protein, we are now developing a new diagnosis. (2) Emotion and pain: We are analyzing the human brain regions by near-infrared spectroscopy, when emotion is changed or pain is applied. Especially, we focus on the relation between psychological expression and neuroscientific mechanisms. (3) Slow ageing: We are studying signaling cascades from environmental electromagnetic-wave radiation to heat shock protein production via transient receptor potential channel opening. We hope that this study will pave the way for slow ageing in humans. (4) Learning and memory: The molecular mechanisms of learning and memory using the pond snail Lymnaea stagnalis are being clarified. We have made clear the effect of insulin in the brain on long-term synaptic changes and long-term memory. (5) Immunology: We found that intestinal dendritic cells produce retinoic acid and imprint gut-homing specificity on T, B lymphocytes with it. Retinoic acid also affects functional differentiation of helper T cells. We aim to clarify the mechanism of its production, metabolism, and action.