for polymerase chain reaction (PCR) to rapidly control the temperature [3] . Next, a large amount of DNA (10-30 µg/25 µl) can be synthesized in a short time (15-60 min) while maintaining high specificity. This characteristic greatly facilitates detection of the LAMP reaction [9] . Moreover, since the LAMP reaction progresses by generating a characteristic stem-loop structure, LAMP products have a single-stranded segment in the molecule (loop segment; see Figure 1 and reference No. 1). By using oligo DNA probes designed to recognize the sequence of the single-stranded segment, it is possible to carry out hybridization assay without performing heat denaturation after amplification. This means that all processes, from the amplification reaction to the detection reaction, can be carried out completely isothermally.