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The walking technicolor based on the ladder Schwinger-Dyson gap equation isstudied, with the scale-invariant coupling being an idealization of theCaswell-Banks-Zaks infrared fixed point in the "anti-Veneziano limit", suchthat $N_C \rightarrow \infty$ with $N_C \cdot \alpha(\mu^2)=$ fixed and$N_F/N_C=$ fixed ($\gg 1$), of the $SU(N_C)$ gauge theory with massless $N_F$flavors near criticality. We show that the 125 GeV Higgs can be naturallyidentified with the technidilaton (TD) predicted in the walking technicolor, apseudo Nambu-Goldstone (NG) boson of the spontaneous symmetry breaking of theapproximate scale symmetry. Ladder calculations yield the TD mass $M_\phi$ fromthe trace anomaly as $M_\phi^2 F_\phi^2= -4 \langle \theta_\mu^\mu \rangle = -\frac{\beta(\alpha (\mu^2))}{\alpha(\mu^2)}\, \langle G_{\lambda\nu}^2(\mu^2)\rangle \simeq N_C N_F\frac{16}{\pi^4} m_F^4$, independently ofthe renormalization point $\mu$, where $m_F$ is the dynamical mass of thetechnifermion, and $F_\phi={\cal O} (\sqrt{N_F N_C}\, m_F)$ the TD decayconstant. It reads $M_\phi^2\simeq (\frac{v_{\rm EW}}{2} \cdot \frac{5 v_{\rmEW}}{F_\phi})^2 \cdot [\frac{8}{N_F}\frac{4}{N_C}]$, ($v_{\rm EW}=246$ GeV),which implies $F_\phi\simeq 5 \,v_{\rm EW} $ for $M_\phi \simeq 125\, {\rmGeV}\simeq \frac{1}{2} v_{\rm EW}$ in the one-family model ($N_C=4, N_F=8$), ingood agreement with the current LHC Higgs data. The result reflects a genericscaling $ M_\phi^2/v_{\rm EW}^2\sim M_\phi^2/F_\phi^2 \sim m_F^2 /F_\phi^2 \sim1/(N_F N_C) \rightarrow 0 $ as a vanishing trace anomaly, namely the TD has amass vanishing in the anti-Veneziano limit, similarly to $\eta^\prime$ meson asa pseudo-NG boson of the ordinary QCD with vanishing $U(1)_A$ anomaly in theVeneziano limit ($N_F/N_C \ll 1$).

Walking on the Ladder: 125 GeV Technidilaton, or Conformal Higgs -Dedicated to the late Professor Yoichiro Nambu-