Under construction of the Hokusatsu tunnel（4.85km in length）, which transects through the Miocene Shibi-san granitic pluton（granodiorite） and the Cretaceous Shimanto Group, distributed in the northwestern part of Kagoshima Prefecture, large amount of water inflow to the tunnel occurred . The water contains As up to 0.3mg/L.

Microscopic observation and electron probe microanalyses have revealed that the granodiorite contains As minerals as arsenopyrite（46.6-48.7wt%As）and löllingite（71.6-74.0wt% As） . These minerals are found in fresh rocks of hornblende-bearing biotite granodiorite as primary minerals. Arsenopyrite occurs as euhedral to anhedral forms of 50-800 μm in length, while löllingite takes irregular shapes of 30-50 μm across. Comparing ionic compositions of waters for the streams above the tunnel and the inflow to the tunnel, it is considered that As release has occurred to the groundwater in the surface layer of the weathered granodiorite by oxidative dissolution of arsenopyrite, which is widely dispersed in the peripheral part of the Shibi-san granitic pluton. Then, the As-bearing groundwater has moved downward through the fracture zone, and happened to inflow to the tunnel.

It is important for the disposal of excavated rocks in tunnel construction that very fine grains of arsenic minerals occur in the fresh granitic rocks, especially in Miocene ilmenite-series granitic plutons distributed sporadically in the Outer Zone of Kyushu, Japan.

In the Republic of Honduras in Central America, the establishment of a department of the Engineering Geology has been needed in higher educational organizations, in order to take care of exploration/research on the mine resources and slope disasters in the country. The authors organized the issues on the establishment of the department and have discussed pragmatic proposals on it for the National Autonomous University of Honduras based on lessons and examples on the education of engineering geology in Japan, as an activity of a project on the Japan International CooperationAgency （JICA） .

The proposal is mainly divided into the curriculum and the organization. On the curriculum, the classes on “introduction of earth science”, “earth science”, “applied GIS technology”, “environmental geology” and “slope disaster management” were proposed to add to the current curriculum, and a curriculum map has been prepared. On the organization, “additional teachers of geology/engineering geology” and “collaboration with other departments in the university and external organizations” were proposed.

The report summarized the issues and the proposals on the est ablishment of department of the Engineering Geology.

The NE-SW-trending Saigatao Tectonic Line with the length of 20 km long in central-southern part of Yamaguchi Prefecture, Southwest Japan, has been known as a geological boundary fault between Suo Metamorphic Rocks of the Triassic to Jurassic period and Ota Group in the Permian period. Tectonic reliefs and active fault outcrops concerning the tectonic line have not yet been described. Fault outcrop Loc. 1（Nagaono, Ube City）and Loc. 2（Mana, Mine City） near the Saigatao Tectonic Line are newly identified by topographic and geological investigations. In the fault outcrop Loc. 1, the fault is recognized between mudstone of Ota Group and pelitic schist of Suo Metamorphic Rocks and this fault is corresponding to the Saigatao Tectonic Line, but does not give Lower river terrace deposits the displacement and deformation. In the fault outcrop Loc. 2, the fault in the sandstone and mudstone belonging to Ota Group is recognized. This outcrop is located in the 40m westward to the Saigatao Tectonic Line and the fault concerning the Saigatao Tectonic Line, because the strikes of the fault in the outcrop and the Saigatao Tectonic Line have the same strike NE-SW. The boundary between the fractured zone and the host rock displaces the Middle river terrace deposits（after85,000-90,000～130,000 y.b.p.）. Therefore, it is possible that, at least, the part of the Saigatao Tectonic Line is an active fault and the latest movement age of the active part is after the Late Pleistocene.