子供を大人に育てるように、ソイルバッグ直下の土を“育てて強くする”工法。環境に優しい工法である。将来“産廃”となり、強い毒性もあるセメントを用いる必要はない。水を通さなくなるセメント改良は、地震時や豪雨時に致命的となることが多い。仮にセメントで固まったとしても、その下は水が抜けないので軟弱のままである。多く用いられているようであるが、土の本質を見ない“自然の理”に反する工法であると言える。地球環境の悪化が限界に達している現在、自然と共生する、自然に同化した、自然に優しい工法を全地球上で積極的に推進すべきであると考える。 →　続きはTHEORY-理論（ものの考え方）へ

Soilbag method (D・BOX method) is a construction method to “grow and strengthen soils” under soilbags (D・BOXes ) so as to grow children as adults. It is an environmentally friendly construction method. There is no need to use “cements” which eventually become “industrial wastes” with strong toxicity. Cement improvements that make water impermeable are often fatal when facing an earthquake or heavy rain. Even though the soil solidifies with cement, the soil under the solidified part remains soft and weak because the water cannot be pulled out. Contrary to “the principle of nature,” the cement improvement has to be said that it is a method which fails the true nature of soil, although it is used in many cases. We believe that the soilbag method should be positively promoted on the whole planet as a naturally-friendly, naturally assimilated construction method coexisting with nature, as the deterioration of the global environment has reached its limit. → Continue to THEORY (way of thinking)