Zinc, the most historical material for battery application, is one of the candidates for the high capacity electrodes of the next-generation secondary batteries, and has been applied in Zn/Air, Zn/NiOOH. These zinc-based batteries commonly employ aqueous alkaline electrolytes that have some advantages such as high ionic conductivity for high rate capability and non-flammability for high safety, which are particularly attractive for the mobile and EV applications. However, their insufficient cycle life due to the deterioration modes such as zinc dendrite formation, densification and shape change, has limited the widespread use of the zinc-based secondary batteries. In particular, the shape change is known to be a serious problem, in which the active material is gradually lost at the edge and agglomerates in the center of the electrode in the course of cycling, resulting in the capacity fade.For suppressing this undesirable redistribution of the zinc electrode, it is essential to clarify the growth mechanism of the shape change phenomenon. So far the growth mechanism has been studied and analyzed, especially in the view point of the reaction (current) distribution, by various methods such as direct visual observation, tracing radioisotope, monitoring current distribution with the use of divided electrode, and calculating mathematical model. As the shape change proceeds dynamically with charging-discharging cycles causing electrode composition changes, the detailed observation of the composition change of zinc species during the cycling offer fruitful information on the reaction distribution to understand the growth mechanism of the shape change precisely and key to improve it. In this study, we evaluate the distribution of zinc species in Zn/NiOOH cells to elucidate the way the shape change occurs in the course of cell cycling.