This article explains the leveraging AI named HAICoLab to open up new horizons through metacognition and creativity. It has also been shown that the purpose of using data in material and product development is feature exploration. A feature is a combination of design factors that contribute to the desired performance balance, and an example of feature discovery using clustering and machine learning with ChatGPT is presented. In addition, a tire development process based on a "human-AI collaboration" using AI and XAI (eXpalainable AI) to present features to humans is introduced. On the other hand, it is also stated that in order to utilize data and AI to gain new insights, it is preferable to reduce the influence of cognitive biases such as preconceptions. An example is introduced showing that facilitation to maintain an open mind is effective for this purpose.